diff mbox series

[v3,3/7] mm/memory_hotplug: prepare passing flags to add_memory() and friends

Message ID 20200910091340.8654-4-david@redhat.com
State New
Headers show
Series mm/memory_hotplug: selective merging of system ram resources | expand

Commit Message

David Hildenbrand Sept. 10, 2020, 9:13 a.m. UTC
We soon want to pass flags, e.g., to mark added System RAM resources.
mergeable. Prepare for that.

This patch is based on a similar patch by Oscar Salvador:

https://lkml.kernel.org/r/20190625075227.15193-3-osalvador@suse.de

Acked-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Juergen Gross <jgross@suse.com> # Xen related part
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: "Oliver O'Halloran" <oohall@gmail.com>
Cc: Pingfan Liu <kernelfans@gmail.com>
Cc: Nathan Lynch <nathanl@linux.ibm.com>
Cc: Libor Pechacek <lpechacek@suse.cz>
Cc: Anton Blanchard <anton@ozlabs.org>
Cc: Leonardo Bras <leobras.c@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-nvdimm@lists.01.org
Cc: linux-hyperv@vger.kernel.org
Cc: linux-s390@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: xen-devel@lists.xenproject.org
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 arch/powerpc/platforms/powernv/memtrace.c       |  2 +-
 arch/powerpc/platforms/pseries/hotplug-memory.c |  2 +-
 drivers/acpi/acpi_memhotplug.c                  |  3 ++-
 drivers/base/memory.c                           |  3 ++-
 drivers/dax/kmem.c                              |  2 +-
 drivers/hv/hv_balloon.c                         |  2 +-
 drivers/s390/char/sclp_cmd.c                    |  2 +-
 drivers/virtio/virtio_mem.c                     |  2 +-
 drivers/xen/balloon.c                           |  2 +-
 include/linux/memory_hotplug.h                  | 16 ++++++++++++----
 mm/memory_hotplug.c                             | 14 +++++++-------
 11 files changed, 30 insertions(+), 20 deletions(-)

Comments

Pankaj Gupta Sept. 10, 2020, 9:53 a.m. UTC | #1
> We soon want to pass flags, e.g., to mark added System RAM resources.
> mergeable. Prepare for that.
>
> This patch is based on a similar patch by Oscar Salvador:
>
> https://lkml.kernel.org/r/20190625075227.15193-3-osalvador@suse.de
>
> Acked-by: Wei Liu <wei.liu@kernel.org>
> Reviewed-by: Juergen Gross <jgross@suse.com> # Xen related part
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Cc: Jason Gunthorpe <jgg@ziepe.ca>
> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
> Cc: Baoquan He <bhe@redhat.com>
> Cc: Wei Yang <richardw.yang@linux.intel.com>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Len Brown <lenb@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Vishal Verma <vishal.l.verma@intel.com>
> Cc: Dave Jiang <dave.jiang@intel.com>
> Cc: "K. Y. Srinivasan" <kys@microsoft.com>
> Cc: Haiyang Zhang <haiyangz@microsoft.com>
> Cc: Stephen Hemminger <sthemmin@microsoft.com>
> Cc: Wei Liu <wei.liu@kernel.org>
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Jason Wang <jasowang@redhat.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: Juergen Gross <jgross@suse.com>
> Cc: Stefano Stabellini <sstabellini@kernel.org>
> Cc: "Oliver O'Halloran" <oohall@gmail.com>
> Cc: Pingfan Liu <kernelfans@gmail.com>
> Cc: Nathan Lynch <nathanl@linux.ibm.com>
> Cc: Libor Pechacek <lpechacek@suse.cz>
> Cc: Anton Blanchard <anton@ozlabs.org>
> Cc: Leonardo Bras <leobras.c@gmail.com>
> Cc: linuxppc-dev@lists.ozlabs.org
> Cc: linux-acpi@vger.kernel.org
> Cc: linux-nvdimm@lists.01.org
> Cc: linux-hyperv@vger.kernel.org
> Cc: linux-s390@vger.kernel.org
> Cc: virtualization@lists.linux-foundation.org
> Cc: xen-devel@lists.xenproject.org
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  arch/powerpc/platforms/powernv/memtrace.c       |  2 +-
>  arch/powerpc/platforms/pseries/hotplug-memory.c |  2 +-
>  drivers/acpi/acpi_memhotplug.c                  |  3 ++-
>  drivers/base/memory.c                           |  3 ++-
>  drivers/dax/kmem.c                              |  2 +-
>  drivers/hv/hv_balloon.c                         |  2 +-
>  drivers/s390/char/sclp_cmd.c                    |  2 +-
>  drivers/virtio/virtio_mem.c                     |  2 +-
>  drivers/xen/balloon.c                           |  2 +-
>  include/linux/memory_hotplug.h                  | 16 ++++++++++++----
>  mm/memory_hotplug.c                             | 14 +++++++-------
>  11 files changed, 30 insertions(+), 20 deletions(-)
>
> diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
> index 13b369d2cc454..6828108486f83 100644
> --- a/arch/powerpc/platforms/powernv/memtrace.c
> +++ b/arch/powerpc/platforms/powernv/memtrace.c
> @@ -224,7 +224,7 @@ static int memtrace_online(void)
>                         ent->mem = 0;
>                 }
>
> -               if (add_memory(ent->nid, ent->start, ent->size)) {
> +               if (add_memory(ent->nid, ent->start, ent->size, MHP_NONE)) {
>                         pr_err("Failed to add trace memory to node %d\n",
>                                 ent->nid);
>                         ret += 1;
> diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
> index 0ea976d1cac47..e1c9fa0d730f5 100644
> --- a/arch/powerpc/platforms/pseries/hotplug-memory.c
> +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
> @@ -615,7 +615,7 @@ static int dlpar_add_lmb(struct drmem_lmb *lmb)
>         nid = memory_add_physaddr_to_nid(lmb->base_addr);
>
>         /* Add the memory */
> -       rc = __add_memory(nid, lmb->base_addr, block_sz);
> +       rc = __add_memory(nid, lmb->base_addr, block_sz, MHP_NONE);
>         if (rc) {
>                 invalidate_lmb_associativity_index(lmb);
>                 return rc;
> diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
> index e294f44a78504..2067c3bc55763 100644
> --- a/drivers/acpi/acpi_memhotplug.c
> +++ b/drivers/acpi/acpi_memhotplug.c
> @@ -207,7 +207,8 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
>                 if (node < 0)
>                         node = memory_add_physaddr_to_nid(info->start_addr);
>
> -               result = __add_memory(node, info->start_addr, info->length);
> +               result = __add_memory(node, info->start_addr, info->length,
> +                                     MHP_NONE);
>
>                 /*
>                  * If the memory block has been used by the kernel, add_memory()
> diff --git a/drivers/base/memory.c b/drivers/base/memory.c
> index 4db3c660de831..b4c297dd04755 100644
> --- a/drivers/base/memory.c
> +++ b/drivers/base/memory.c
> @@ -432,7 +432,8 @@ static ssize_t probe_store(struct device *dev, struct device_attribute *attr,
>
>         nid = memory_add_physaddr_to_nid(phys_addr);
>         ret = __add_memory(nid, phys_addr,
> -                          MIN_MEMORY_BLOCK_SIZE * sections_per_block);
> +                          MIN_MEMORY_BLOCK_SIZE * sections_per_block,
> +                          MHP_NONE);
>
>         if (ret)
>                 goto out;
> diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
> index 7dcb2902e9b1b..896cb9444e727 100644
> --- a/drivers/dax/kmem.c
> +++ b/drivers/dax/kmem.c
> @@ -95,7 +95,7 @@ int dev_dax_kmem_probe(struct dev_dax *dev_dax)
>                  * this as RAM automatically.
>                  */
>                 rc = add_memory_driver_managed(numa_node, range.start,
> -                               range_len(&range), kmem_name);
> +                               range_len(&range), kmem_name, MHP_NONE);
>
>                 res->flags |= IORESOURCE_BUSY;
>                 if (rc) {
> diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
> index 32e3bc0aa665a..3c0d52e244520 100644
> --- a/drivers/hv/hv_balloon.c
> +++ b/drivers/hv/hv_balloon.c
> @@ -726,7 +726,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size,
>
>                 nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn));
>                 ret = add_memory(nid, PFN_PHYS((start_pfn)),
> -                               (HA_CHUNK << PAGE_SHIFT));
> +                               (HA_CHUNK << PAGE_SHIFT), MHP_NONE);
>
>                 if (ret) {
>                         pr_err("hot_add memory failed error is %d\n", ret);
> diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
> index a864b21af602a..f6e97f0830f64 100644
> --- a/drivers/s390/char/sclp_cmd.c
> +++ b/drivers/s390/char/sclp_cmd.c
> @@ -406,7 +406,7 @@ static void __init add_memory_merged(u16 rn)
>         if (!size)
>                 goto skip_add;
>         for (addr = start; addr < start + size; addr += block_size)
> -               add_memory(0, addr, block_size);
> +               add_memory(0, addr, block_size, MHP_NONE);
>  skip_add:
>         first_rn = rn;
>         num = 1;
> diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
> index 834b7c13ef3dc..ed99e43354010 100644
> --- a/drivers/virtio/virtio_mem.c
> +++ b/drivers/virtio/virtio_mem.c
> @@ -424,7 +424,7 @@ static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
>
>         dev_dbg(&vm->vdev->dev, "adding memory block: %lu\n", mb_id);
>         return add_memory_driver_managed(nid, addr, memory_block_size_bytes(),
> -                                        vm->resource_name);
> +                                        vm->resource_name, MHP_NONE);
>  }
>
>  /*
> diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
> index 51427c752b37b..9f40a294d398d 100644
> --- a/drivers/xen/balloon.c
> +++ b/drivers/xen/balloon.c
> @@ -331,7 +331,7 @@ static enum bp_state reserve_additional_memory(void)
>         mutex_unlock(&balloon_mutex);
>         /* add_memory_resource() requires the device_hotplug lock */
>         lock_device_hotplug();
> -       rc = add_memory_resource(nid, resource);
> +       rc = add_memory_resource(nid, resource, MHP_NONE);
>         unlock_device_hotplug();
>         mutex_lock(&balloon_mutex);
>
> diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
> index 51a877fec8da8..e53d1058f3443 100644
> --- a/include/linux/memory_hotplug.h
> +++ b/include/linux/memory_hotplug.h
> @@ -57,6 +57,12 @@ enum {
>         MMOP_ONLINE_MOVABLE,
>  };
>
> +/* Flags for add_memory() and friends to specify memory hotplug details. */
> +typedef int __bitwise mhp_t;
> +
> +/* No special request */
> +#define MHP_NONE               ((__force mhp_t)0)
> +
>  /*
>   * Extended parameters for memory hotplug:
>   * altmap: alternative allocator for memmap array (optional)
> @@ -345,11 +351,13 @@ extern void set_zone_contiguous(struct zone *zone);
>  extern void clear_zone_contiguous(struct zone *zone);
>
>  extern void __ref free_area_init_core_hotplug(int nid);
> -extern int __add_memory(int nid, u64 start, u64 size);
> -extern int add_memory(int nid, u64 start, u64 size);
> -extern int add_memory_resource(int nid, struct resource *resource);
> +extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
> +extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
> +extern int add_memory_resource(int nid, struct resource *resource,
> +                              mhp_t mhp_flags);
>  extern int add_memory_driver_managed(int nid, u64 start, u64 size,
> -                                    const char *resource_name);
> +                                    const char *resource_name,
> +                                    mhp_t mhp_flags);
>  extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
>                                    unsigned long nr_pages,
>                                    struct vmem_altmap *altmap, int migratetype);
> diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> index 8e1cd18b5cf14..8f0bd7c9a63a5 100644
> --- a/mm/memory_hotplug.c
> +++ b/mm/memory_hotplug.c
> @@ -1039,7 +1039,7 @@ static int online_memory_block(struct memory_block *mem, void *arg)
>   *
>   * we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG
>   */
> -int __ref add_memory_resource(int nid, struct resource *res)
> +int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
>  {
>         struct mhp_params params = { .pgprot = PAGE_KERNEL };
>         u64 start, size;
> @@ -1118,7 +1118,7 @@ int __ref add_memory_resource(int nid, struct resource *res)
>  }
>
>  /* requires device_hotplug_lock, see add_memory_resource() */
> -int __ref __add_memory(int nid, u64 start, u64 size)
> +int __ref __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags)
>  {
>         struct resource *res;
>         int ret;
> @@ -1127,18 +1127,18 @@ int __ref __add_memory(int nid, u64 start, u64 size)
>         if (IS_ERR(res))
>                 return PTR_ERR(res);
>
> -       ret = add_memory_resource(nid, res);
> +       ret = add_memory_resource(nid, res, mhp_flags);
>         if (ret < 0)
>                 release_memory_resource(res);
>         return ret;
>  }
>
> -int add_memory(int nid, u64 start, u64 size)
> +int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags)
>  {
>         int rc;
>
>         lock_device_hotplug();
> -       rc = __add_memory(nid, start, size);
> +       rc = __add_memory(nid, start, size, mhp_flags);
>         unlock_device_hotplug();
>
>         return rc;
> @@ -1167,7 +1167,7 @@ EXPORT_SYMBOL_GPL(add_memory);
>   * "System RAM ($DRIVER)".
>   */
>  int add_memory_driver_managed(int nid, u64 start, u64 size,
> -                             const char *resource_name)
> +                             const char *resource_name, mhp_t mhp_flags)
>  {
>         struct resource *res;
>         int rc;
> @@ -1185,7 +1185,7 @@ int add_memory_driver_managed(int nid, u64 start, u64 size,
>                 goto out_unlock;
>         }
>
> -       rc = add_memory_resource(nid, res);
> +       rc = add_memory_resource(nid, res, mhp_flags);
>         if (rc < 0)
>                 release_memory_resource(res);
>
> --

Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>

> 2.26.2
>
kernel test robot Sept. 11, 2020, 2:21 a.m. UTC | #2
Hi David,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20200909]
[cannot apply to mmotm/master hnaz-linux-mm/master xen-tip/linux-next powerpc/next linus/master v5.9-rc4 v5.9-rc3 v5.9-rc2 v5.9-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
base:    7204eaa2c1f509066486f488c9dcb065d7484494
config: x86_64-randconfig-a016-20200909 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   WARNING: unmet direct dependencies detected for PHY_SAMSUNG_UFS
   Depends on OF && (ARCH_EXYNOS || COMPILE_TEST
   Selected by
   - SCSI_UFS_EXYNOS && SCSI_LOWLEVEL && SCSI && SCSI_UFSHCD_PLATFORM && (ARCH_EXYNOS || COMPILE_TEST
   In file included from arch/x86/kernel/asm-offsets.c:9:
   In file included from include/linux/crypto.h:20:
   In file included from include/linux/slab.h:15:
   In file included from include/linux/gfp.h:6:
   In file included from include/linux/mmzone.h:853:
>> include/linux/memory_hotplug.h:354:55: error: unknown type name 'mhp_t'
   extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
   ^
   include/linux/memory_hotplug.h:355:53: error: unknown type name 'mhp_t'
   extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
   ^
   include/linux/memory_hotplug.h:357:11: error: unknown type name 'mhp_t'
   mhp_t mhp_flags);
   ^
   include/linux/memory_hotplug.h:360:10: error: unknown type name 'mhp_t'
   mhp_t mhp_flags);
   ^
   4 errors generated.
   Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [scripts/Makefile.build:117: arch/x86/kernel/asm-offsets.s] Error 1
   Target '__build' not remade because of errors.
   Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:1196: prepare0] Error 2
   Target 'prepare' not remade because of errors.
   make: Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:185: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

# https://github.com/0day-ci/linux/commit/d88270d1c0783a7f99f24a85692be90fd2ae0d7d
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
git checkout d88270d1c0783a7f99f24a85692be90fd2ae0d7d
vim +/mhp_t +354 include/linux/memory_hotplug.h

   352	
   353	extern void __ref free_area_init_core_hotplug(int nid);
 > 354	extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
David Hildenbrand Sept. 11, 2020, 8:20 a.m. UTC | #3
On 11.09.20 04:21, kernel test robot wrote:
> Hi David,
> 
> I love your patch! Yet something to improve:
> 
> [auto build test ERROR on next-20200909]
> [cannot apply to mmotm/master hnaz-linux-mm/master xen-tip/linux-next powerpc/next linus/master v5.9-rc4 v5.9-rc3 v5.9-rc2 v5.9-rc4]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
> 
> url:    https://github.com/0day-ci/linux/commits/David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
> base:    7204eaa2c1f509066486f488c9dcb065d7484494
> config: x86_64-randconfig-a016-20200909 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install x86_64 cross compiling tool for clang build
>         # apt-get install binutils-x86-64-linux-gnu
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    WARNING: unmet direct dependencies detected for PHY_SAMSUNG_UFS
>    Depends on OF && (ARCH_EXYNOS || COMPILE_TEST
>    Selected by
>    - SCSI_UFS_EXYNOS && SCSI_LOWLEVEL && SCSI && SCSI_UFSHCD_PLATFORM && (ARCH_EXYNOS || COMPILE_TEST
>    In file included from arch/x86/kernel/asm-offsets.c:9:
>    In file included from include/linux/crypto.h:20:
>    In file included from include/linux/slab.h:15:
>    In file included from include/linux/gfp.h:6:
>    In file included from include/linux/mmzone.h:853:
>>> include/linux/memory_hotplug.h:354:55: error: unknown type name 'mhp_t'
>    extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
>    ^
>    include/linux/memory_hotplug.h:355:53: error: unknown type name 'mhp_t'
>    extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
>    ^
>    include/linux/memory_hotplug.h:357:11: error: unknown type name 'mhp_t'
>    mhp_t mhp_flags);
>    ^
>    include/linux/memory_hotplug.h:360:10: error: unknown type name 'mhp_t'
>    mhp_t mhp_flags);
>    ^
>    4 errors generated.
>    Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [scripts/Makefile.build:117: arch/x86/kernel/asm-offsets.s] Error 1
>    Target '__build' not remade because of errors.
>    Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:1196: prepare0] Error 2
>    Target 'prepare' not remade because of errors.
>    make: Makefile Module.symvers System.map arch block certs crypto drivers fs include init ipc kernel lib mm modules.builtin modules.builtin.modinfo modules.order net scripts security sound source tools usr virt vmlinux vmlinux.o vmlinux.symvers [Makefile:185: __sub-make] Error 2
>    make: Target 'prepare' not remade because of errors.
> 
> # https://github.com/0day-ci/linux/commit/d88270d1c0783a7f99f24a85692be90fd2ae0d7d
> git remote add linux-review https://github.com/0day-ci/linux
> git fetch --no-tags linux-review David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
> git checkout d88270d1c0783a7f99f24a85692be90fd2ae0d7d
> vim +/mhp_t +354 include/linux/memory_hotplug.h
> 
>    352	
>    353	extern void __ref free_area_init_core_hotplug(int nid);
>  > 354	extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
> 

add_memory() and not protected by CONFIG_MEMORY_HOTPLUG, but the new
type is. Will look into it.
kernel test robot Sept. 15, 2020, 8:46 a.m. UTC | #4
Hi David,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20200909]
[cannot apply to mmotm/master hnaz-linux-mm/master xen-tip/linux-next powerpc/next linus/master v5.9-rc4 v5.9-rc3 v5.9-rc2 v5.9-rc4]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
base:    7204eaa2c1f509066486f488c9dcb065d7484494
:::::: branch date: 9 hours ago
:::::: commit date: 9 hours ago
config: powerpc-randconfig-r011-20200909 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 0a5dc7effb191eff740e0e7ae7bd8e1f6bdb3ad9)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from arch/powerpc/kernel/asm-offsets.c:14:
   In file included from include/linux/compat.h:17:
   In file included from include/linux/fs.h:15:
   In file included from include/linux/radix-tree.h:18:
   In file included from include/linux/xarray.h:14:
   In file included from include/linux/gfp.h:6:
   In file included from include/linux/mmzone.h:853:
   include/linux/memory_hotplug.h:354:55: error: unknown type name 'mhp_t'
   extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
                                                         ^
   include/linux/memory_hotplug.h:355:53: error: unknown type name 'mhp_t'
   extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
                                                       ^
   include/linux/memory_hotplug.h:357:11: error: unknown type name 'mhp_t'
                                  mhp_t mhp_flags);
                                  ^
   include/linux/memory_hotplug.h:360:10: error: unknown type name 'mhp_t'
                                        mhp_t mhp_flags);
                                        ^
   In file included from arch/powerpc/kernel/asm-offsets.c:21:
>> include/linux/mman.h:137:9: warning: division by zero is undefined [-Wdivision-by-zero]
                  _calc_vm_trans(flags, MAP_LOCKED,     VM_LOCKED    ) |
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/mman.h:115:21: note: expanded from macro '_calc_vm_trans'
      : ((x) & (bit1)) / ((bit1) / (bit2))))
                       ^ ~~~~~~~~~~~~~~~~~
   include/linux/mman.h:138:9: warning: division by zero is undefined [-Wdivision-by-zero]
                  _calc_vm_trans(flags, MAP_SYNC,       VM_SYNC      );
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/mman.h:115:21: note: expanded from macro '_calc_vm_trans'
      : ((x) & (bit1)) / ((bit1) / (bit2))))
                       ^ ~~~~~~~~~~~~~~~~~
   2 warnings and 4 errors generated.
   make[2]: *** [scripts/Makefile.build:117: arch/powerpc/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [Makefile:1196: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:185: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

# https://github.com/0day-ci/linux/commit/d88270d1c0783a7f99f24a85692be90fd2ae0d7d
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review David-Hildenbrand/mm-memory_hotplug-selective-merging-of-system-ram-resources/20200910-171630
git checkout d88270d1c0783a7f99f24a85692be90fd2ae0d7d
vim +137 include/linux/mman.h

^1da177e4c3f41 Linus Torvalds  2005-04-16  128  
^1da177e4c3f41 Linus Torvalds  2005-04-16  129  /*
^1da177e4c3f41 Linus Torvalds  2005-04-16  130   * Combine the mmap "flags" argument into "vm_flags" used internally.
^1da177e4c3f41 Linus Torvalds  2005-04-16  131   */
^1da177e4c3f41 Linus Torvalds  2005-04-16  132  static inline unsigned long
^1da177e4c3f41 Linus Torvalds  2005-04-16  133  calc_vm_flag_bits(unsigned long flags)
^1da177e4c3f41 Linus Torvalds  2005-04-16  134  {
^1da177e4c3f41 Linus Torvalds  2005-04-16  135  	return _calc_vm_trans(flags, MAP_GROWSDOWN,  VM_GROWSDOWN ) |
^1da177e4c3f41 Linus Torvalds  2005-04-16  136  	       _calc_vm_trans(flags, MAP_DENYWRITE,  VM_DENYWRITE ) |
b6fb293f2497a9 Jan Kara        2017-11-01 @137  	       _calc_vm_trans(flags, MAP_LOCKED,     VM_LOCKED    ) |
b6fb293f2497a9 Jan Kara        2017-11-01  138  	       _calc_vm_trans(flags, MAP_SYNC,	     VM_SYNC      );
^1da177e4c3f41 Linus Torvalds  2005-04-16  139  }
00619bcc44d6b7 Jerome Marchand 2013-11-12  140  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c
index 13b369d2cc454..6828108486f83 100644
--- a/arch/powerpc/platforms/powernv/memtrace.c
+++ b/arch/powerpc/platforms/powernv/memtrace.c
@@ -224,7 +224,7 @@  static int memtrace_online(void)
 			ent->mem = 0;
 		}
 
-		if (add_memory(ent->nid, ent->start, ent->size)) {
+		if (add_memory(ent->nid, ent->start, ent->size, MHP_NONE)) {
 			pr_err("Failed to add trace memory to node %d\n",
 				ent->nid);
 			ret += 1;
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 0ea976d1cac47..e1c9fa0d730f5 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -615,7 +615,7 @@  static int dlpar_add_lmb(struct drmem_lmb *lmb)
 	nid = memory_add_physaddr_to_nid(lmb->base_addr);
 
 	/* Add the memory */
-	rc = __add_memory(nid, lmb->base_addr, block_sz);
+	rc = __add_memory(nid, lmb->base_addr, block_sz, MHP_NONE);
 	if (rc) {
 		invalidate_lmb_associativity_index(lmb);
 		return rc;
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index e294f44a78504..2067c3bc55763 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -207,7 +207,8 @@  static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
 		if (node < 0)
 			node = memory_add_physaddr_to_nid(info->start_addr);
 
-		result = __add_memory(node, info->start_addr, info->length);
+		result = __add_memory(node, info->start_addr, info->length,
+				      MHP_NONE);
 
 		/*
 		 * If the memory block has been used by the kernel, add_memory()
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 4db3c660de831..b4c297dd04755 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -432,7 +432,8 @@  static ssize_t probe_store(struct device *dev, struct device_attribute *attr,
 
 	nid = memory_add_physaddr_to_nid(phys_addr);
 	ret = __add_memory(nid, phys_addr,
-			   MIN_MEMORY_BLOCK_SIZE * sections_per_block);
+			   MIN_MEMORY_BLOCK_SIZE * sections_per_block,
+			   MHP_NONE);
 
 	if (ret)
 		goto out;
diff --git a/drivers/dax/kmem.c b/drivers/dax/kmem.c
index 7dcb2902e9b1b..896cb9444e727 100644
--- a/drivers/dax/kmem.c
+++ b/drivers/dax/kmem.c
@@ -95,7 +95,7 @@  int dev_dax_kmem_probe(struct dev_dax *dev_dax)
 		 * this as RAM automatically.
 		 */
 		rc = add_memory_driver_managed(numa_node, range.start,
-				range_len(&range), kmem_name);
+				range_len(&range), kmem_name, MHP_NONE);
 
 		res->flags |= IORESOURCE_BUSY;
 		if (rc) {
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c
index 32e3bc0aa665a..3c0d52e244520 100644
--- a/drivers/hv/hv_balloon.c
+++ b/drivers/hv/hv_balloon.c
@@ -726,7 +726,7 @@  static void hv_mem_hot_add(unsigned long start, unsigned long size,
 
 		nid = memory_add_physaddr_to_nid(PFN_PHYS(start_pfn));
 		ret = add_memory(nid, PFN_PHYS((start_pfn)),
-				(HA_CHUNK << PAGE_SHIFT));
+				(HA_CHUNK << PAGE_SHIFT), MHP_NONE);
 
 		if (ret) {
 			pr_err("hot_add memory failed error is %d\n", ret);
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index a864b21af602a..f6e97f0830f64 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -406,7 +406,7 @@  static void __init add_memory_merged(u16 rn)
 	if (!size)
 		goto skip_add;
 	for (addr = start; addr < start + size; addr += block_size)
-		add_memory(0, addr, block_size);
+		add_memory(0, addr, block_size, MHP_NONE);
 skip_add:
 	first_rn = rn;
 	num = 1;
diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index 834b7c13ef3dc..ed99e43354010 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -424,7 +424,7 @@  static int virtio_mem_mb_add(struct virtio_mem *vm, unsigned long mb_id)
 
 	dev_dbg(&vm->vdev->dev, "adding memory block: %lu\n", mb_id);
 	return add_memory_driver_managed(nid, addr, memory_block_size_bytes(),
-					 vm->resource_name);
+					 vm->resource_name, MHP_NONE);
 }
 
 /*
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 51427c752b37b..9f40a294d398d 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -331,7 +331,7 @@  static enum bp_state reserve_additional_memory(void)
 	mutex_unlock(&balloon_mutex);
 	/* add_memory_resource() requires the device_hotplug lock */
 	lock_device_hotplug();
-	rc = add_memory_resource(nid, resource);
+	rc = add_memory_resource(nid, resource, MHP_NONE);
 	unlock_device_hotplug();
 	mutex_lock(&balloon_mutex);
 
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 51a877fec8da8..e53d1058f3443 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -57,6 +57,12 @@  enum {
 	MMOP_ONLINE_MOVABLE,
 };
 
+/* Flags for add_memory() and friends to specify memory hotplug details. */
+typedef int __bitwise mhp_t;
+
+/* No special request */
+#define MHP_NONE		((__force mhp_t)0)
+
 /*
  * Extended parameters for memory hotplug:
  * altmap: alternative allocator for memmap array (optional)
@@ -345,11 +351,13 @@  extern void set_zone_contiguous(struct zone *zone);
 extern void clear_zone_contiguous(struct zone *zone);
 
 extern void __ref free_area_init_core_hotplug(int nid);
-extern int __add_memory(int nid, u64 start, u64 size);
-extern int add_memory(int nid, u64 start, u64 size);
-extern int add_memory_resource(int nid, struct resource *resource);
+extern int __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
+extern int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags);
+extern int add_memory_resource(int nid, struct resource *resource,
+			       mhp_t mhp_flags);
 extern int add_memory_driver_managed(int nid, u64 start, u64 size,
-				     const char *resource_name);
+				     const char *resource_name,
+				     mhp_t mhp_flags);
 extern void move_pfn_range_to_zone(struct zone *zone, unsigned long start_pfn,
 				   unsigned long nr_pages,
 				   struct vmem_altmap *altmap, int migratetype);
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 8e1cd18b5cf14..8f0bd7c9a63a5 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1039,7 +1039,7 @@  static int online_memory_block(struct memory_block *mem, void *arg)
  *
  * we are OK calling __meminit stuff here - we have CONFIG_MEMORY_HOTPLUG
  */
-int __ref add_memory_resource(int nid, struct resource *res)
+int __ref add_memory_resource(int nid, struct resource *res, mhp_t mhp_flags)
 {
 	struct mhp_params params = { .pgprot = PAGE_KERNEL };
 	u64 start, size;
@@ -1118,7 +1118,7 @@  int __ref add_memory_resource(int nid, struct resource *res)
 }
 
 /* requires device_hotplug_lock, see add_memory_resource() */
-int __ref __add_memory(int nid, u64 start, u64 size)
+int __ref __add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags)
 {
 	struct resource *res;
 	int ret;
@@ -1127,18 +1127,18 @@  int __ref __add_memory(int nid, u64 start, u64 size)
 	if (IS_ERR(res))
 		return PTR_ERR(res);
 
-	ret = add_memory_resource(nid, res);
+	ret = add_memory_resource(nid, res, mhp_flags);
 	if (ret < 0)
 		release_memory_resource(res);
 	return ret;
 }
 
-int add_memory(int nid, u64 start, u64 size)
+int add_memory(int nid, u64 start, u64 size, mhp_t mhp_flags)
 {
 	int rc;
 
 	lock_device_hotplug();
-	rc = __add_memory(nid, start, size);
+	rc = __add_memory(nid, start, size, mhp_flags);
 	unlock_device_hotplug();
 
 	return rc;
@@ -1167,7 +1167,7 @@  EXPORT_SYMBOL_GPL(add_memory);
  * "System RAM ($DRIVER)".
  */
 int add_memory_driver_managed(int nid, u64 start, u64 size,
-			      const char *resource_name)
+			      const char *resource_name, mhp_t mhp_flags)
 {
 	struct resource *res;
 	int rc;
@@ -1185,7 +1185,7 @@  int add_memory_driver_managed(int nid, u64 start, u64 size,
 		goto out_unlock;
 	}
 
-	rc = add_memory_resource(nid, res);
+	rc = add_memory_resource(nid, res, mhp_flags);
 	if (rc < 0)
 		release_memory_resource(res);