| Message ID | cover.1549555521.git.yi.z.zhang@linux.intel.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | support MAP_SYNC for memory-backend-file | expand |
On Fri, Feb 08, 2019 at 06:10:23PM +0800, Zhang, Yi wrote: > Linux 4.15 introduces a new mmap flag MAP_SYNC, which can be used to > guarantee the write persistence to mmap'ed files supporting DAX (e.g., > files on ext4/xfs file system mounted with '-o dax'). > > A description of MAP_SYNC and MAP_SHARED_VALIDATE can be found at > https://patchwork.kernel.org/patch/10028151/ > > In order to make sure that the file metadata is in sync after a fault > while we are writing a shared DAX supporting backend files, this > patch-set enables QEMU to use MAP_SYNC flag for memory-backend-dax-file. > > As the DAX vs DMA truncated issue was solved, we refined the code and > send out this feature for the v5 version. > > We will pass MAP_SYNC to mmap(2); if MAP_SYNC is supported and > 'share=on' & 'pmem=on'. > Or QEMU will not pass this flag to mmap(2) Overall this looks reasonable to me. Besides the documentation nit: Reviewed-by: Michael S. Tsirkin <mst@redhat.com> > Test with below cases: > 1. pmem=on is set, shared=on is set, MAP_SYNC supported: > a: backend is a dax supporting file. > 1) start VM1 with options: > -object memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_1},size=${DAX_FILE_SIZE_1},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > 2) start VM2 with options: > -object memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_2,size=${DAX_FILE_SIZE_2},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > 3) live migrate from VM1 to VM2. > > 4) Suddly let Host crash or power failure. > > 5) check DAX_FILE_1 and DAX_FILE_2, no corrupt. > > b: backend is a regular file. > 1) start with options > -object memory-backend-file,id=nv_be4,share,mem-path=${REG_FILE},size=${REG_FILE_SIZE},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > will warning "failed to validate with mapping flags: Operation not supported" > FILE_1 and FILE_2 random corrupt. > > 2. Other cases: > FILE_1 and FILE_2 random corrupt. > > Changes in V13: > * 4/5 Micheal: move the inlcude to mmap_alloc.c. > * 4/5 Micheal: refine the warning message. > * 5/5 Micheal: refine the Documentations. > > Changes in V12: > * 2/5: Micheal: Update update-linux-headers.sh > * 3/5: Micheal: Use script update add linux/mman.h > * 4/5: Pankaj,Micheal: 1) fallback to mmap without > MAP_SYNC & MAP_SHARED_VALIDATE if sync not supported or failed > 2) Replace the include with 3/5 added linux/mman.h > * 5/5: Micheal: Refine the Documentations. > > Changes in V11: > * 1/3: Micheal: Change to just add a bool is_pmem in qemu_ram_mmap. > * 2/3: Micheal: Fix the compatibility for old kernel. > * 2/3&3/3: Micheal&Eduardo :Update the behavior below: > Waning at no-dax and continue without MAP_SYNC. > Test if fails again for compatibility, then remove the MAP_VALIDATE and > silently proceed. > > Changes in V10: > * 4/4: refine the document. > * 3/4: Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> > * 2/4: refine the commit message, Added MAP_SHARED_VALIDATE. > * 2/4: Fix the wrong include header > > Changes in V9: > * 1/6: Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> > * 2/6: New Added: Micheal: use sparse feature define RAM_FLAG. > since I don't have much knowledge about the sparse feature, @Micheal Could you > add some documentation/commit message on this patch? Thank you very much. > * 3/6: from 2/5: Eduardo: updated the commit message. > * 4/6: from 3/5: Micheal: don't ignore MAP_SYNC failures silently. > * 5/6: from 4/5: Eduardo: updated the commit message. > * 6/6: from 5/5: Micheal: Drop the sync option, document the MAP_SYNC. > > Changes in v8: > * Micheal: 3/5, remove the duplicated define in the os_dep.h > * Micheal: 2/5, make type define safety. > * Micheal: 2/5, fixed the incorrect define MAP_SHARE on qemu_anon_ram_alloc. > * 4/6 removed, we remove the on/off/auto define of sync, as by now, > MAP_SYNC only worked with pmem=on. > * @Micheal, I still reuse the RAM_SYNC flag, it is much straightforward to parse > all the flags in one parameter. > > Changes in v7: > * Micheal: [3,4,6]/6 limited the "sync" flag only on a nvdimm backend.(pmem=on) > > Changes in v6: > * Pankaj: 3/7 are squashed with 2/7 > * Pankaj: 7/7 update comments to "consistent filesystem metadata". > * Pankaj, Igor: 1/7 Added Reviewed-by in patch-1/7 > * Stefan, 4/7 move the include header from "/linux/mman.h" to "osdep.h" > * Stefan, 5/7 Add missing "munmap" > * Stefan, 2/7 refine the shared/flag. > > Changes in v5: > * Add patch 1 to fix a memory leak issue. > * Refine the patch 4-6 > * Remove the patch 3 as we already change the parameter from "shared" to > "flags" > > Changes in v4: > * Add patch 1-3 to switch some functions to a single 'flags' > parameters. (Michael S. Tsirkin) > * v3 patch 1-3 become v4 patch 4-6. > * Patch 4: move definitions of MAP_SYNC and MAP_SHARED_VALIDATE to a > new header file under include/standard-headers/linux/. (Michael S. Tsirkin) > * Patch 6: refine the description of the 'sync' option. (Michael S. Tsirkin) > > Changes in v3: > * Patch 1: add MAP_SHARED_VALIDATE in both sync=on and sync=auto > cases, and add back the retry mechanism. MAP_SYNC will be ignored > by Linux kernel 4.15 if MAP_SHARED_VALIDATE is missed. > * Patch 1: define MAP_SYNC and MAP_SHARED_VALIDATE as 0 on non-Linux > platforms in order to make qemu_ram_mmap() compile on those platforms. > * Patch 2&3: include more information in error messages of > memory-backend in hope to help user to identify the error. > (Dr. David Alan Gilbert) > * Patch 3: fix typo in the commit message. (Dr. David Alan Gilbert) > > Changes in v2: > * Add 'sync' option to control the use of MAP_SYNC. (Eduardo Habkost) > * Remove the unnecessary set of MAP_SHARED_VALIDATE in some cases and > the retry mechanism in qemu_ram_mmap(). (Michael S. Tsirkin) > * Move OS dependent definitions of MAP_SYNC and MAP_SHARED_VALIDATE > to osdep.h. (Michael S. Tsirkin) > > Zhang Yi (5): > util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap > scripts/update-linux-headers: add linux/mman.h > linux-headers: add linux/mman.h. > util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() > docs: Added MAP_SYNC documentation > > Zhang Yi (5): > util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap > scripts/update-linux-headers: add linux/mman.h > linux-headers: add linux/mman.h. > util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() > docs: Added MAP_SYNC documentation > > docs/nvdimm.txt | 25 ++++++- > exec.c | 2 +- > include/qemu/mmap-alloc.h | 21 +++++- > linux-headers/asm-arm/mman.h | 4 ++ > linux-headers/asm-arm64/mman.h | 1 + > linux-headers/asm-generic/hugetlb_encode.h | 36 ++++++++++ > linux-headers/asm-generic/mman-common.h | 77 ++++++++++++++++++++ > linux-headers/asm-generic/mman.h | 24 +++++++ > linux-headers/asm-mips/mman.h | 108 +++++++++++++++++++++++++++++ > linux-headers/asm-powerpc/mman.h | 39 +++++++++++ > linux-headers/asm-s390/mman.h | 1 + > linux-headers/asm-x86/mman.h | 31 +++++++++ > linux-headers/linux/mman.h | 38 ++++++++++ > qemu-options.hx | 5 ++ > scripts/update-linux-headers.sh | 6 +- > util/mmap-alloc.c | 51 +++++++++++++- > util/oslib-posix.c | 2 +- > 17 files changed, 460 insertions(+), 11 deletions(-) > create mode 100644 linux-headers/asm-arm/mman.h > create mode 100644 linux-headers/asm-arm64/mman.h > create mode 100644 linux-headers/asm-generic/hugetlb_encode.h > create mode 100644 linux-headers/asm-generic/mman-common.h > create mode 100644 linux-headers/asm-generic/mman.h > create mode 100644 linux-headers/asm-mips/mman.h > create mode 100644 linux-headers/asm-powerpc/mman.h > create mode 100644 linux-headers/asm-s390/mman.h > create mode 100644 linux-headers/asm-x86/mman.h > create mode 100644 linux-headers/linux/mman.h > > -- > 2.7.4
> > Linux 4.15 introduces a new mmap flag MAP_SYNC, which can be used to > guarantee the write persistence to mmap'ed files supporting DAX (e.g., > files on ext4/xfs file system mounted with '-o dax'). > > A description of MAP_SYNC and MAP_SHARED_VALIDATE can be found at > https://patchwork.kernel.org/patch/10028151/ > > In order to make sure that the file metadata is in sync after a fault > while we are writing a shared DAX supporting backend files, this > patch-set enables QEMU to use MAP_SYNC flag for memory-backend-dax-file. > > As the DAX vs DMA truncated issue was solved, we refined the code and > send out this feature for the v5 version. > > We will pass MAP_SYNC to mmap(2); if MAP_SYNC is supported and > 'share=on' & 'pmem=on'. > Or QEMU will not pass this flag to mmap(2) > > Test with below cases: > 1. pmem=on is set, shared=on is set, MAP_SYNC supported: > a: backend is a dax supporting file. > 1) start VM1 with options: > -object > memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_1},size=${DAX_FILE_SIZE_1},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > 2) start VM2 with options: > -object > memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_2,size=${DAX_FILE_SIZE_2},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > 3) live migrate from VM1 to VM2. > > 4) Suddly let Host crash or power failure. > > 5) check DAX_FILE_1 and DAX_FILE_2, no corrupt. > > b: backend is a regular file. > 1) start with options > -object > memory-backend-file,id=nv_be4,share,mem-path=${REG_FILE},size=${REG_FILE_SIZE},align=128M,pmem=on,share=on > -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. > > will warning "failed to validate with mapping flags: Operation not > supported" > FILE_1 and FILE_2 random corrupt. > > 2. Other cases: > FILE_1 and FILE_2 random corrupt. > > Changes in V13: > * 4/5 Micheal: move the inlcude to mmap_alloc.c. > * 4/5 Micheal: refine the warning message. > * 5/5 Micheal: refine the Documentations. > > Changes in V12: > * 2/5: Micheal: Update update-linux-headers.sh > * 3/5: Micheal: Use script update add linux/mman.h > * 4/5: Pankaj,Micheal: 1) fallback to mmap without > MAP_SYNC & MAP_SHARED_VALIDATE if sync not supported or failed > 2) Replace the include with 3/5 added linux/mman.h > * 5/5: Micheal: Refine the Documentations. > > Changes in V11: > * 1/3: Micheal: Change to just add a bool is_pmem in qemu_ram_mmap. > * 2/3: Micheal: Fix the compatibility for old kernel. > * 2/3&3/3: Micheal&Eduardo :Update the behavior below: > Waning at no-dax and continue without MAP_SYNC. > Test if fails again for compatibility, then remove the MAP_VALIDATE and > silently proceed. > > Changes in V10: > * 4/4: refine the document. > * 3/4: Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> > * 2/4: refine the commit message, Added MAP_SHARED_VALIDATE. > * 2/4: Fix the wrong include header > > Changes in V9: > * 1/6: Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> > * 2/6: New Added: Micheal: use sparse feature define RAM_FLAG. > since I don't have much knowledge about the sparse feature, @Micheal Could > you > add some documentation/commit message on this patch? Thank you very much. > * 3/6: from 2/5: Eduardo: updated the commit message. > * 4/6: from 3/5: Micheal: don't ignore MAP_SYNC failures silently. > * 5/6: from 4/5: Eduardo: updated the commit message. > * 6/6: from 5/5: Micheal: Drop the sync option, document the MAP_SYNC. > > Changes in v8: > * Micheal: 3/5, remove the duplicated define in the os_dep.h > * Micheal: 2/5, make type define safety. > * Micheal: 2/5, fixed the incorrect define MAP_SHARE on qemu_anon_ram_alloc. > * 4/6 removed, we remove the on/off/auto define of sync, as by now, > MAP_SYNC only worked with pmem=on. > * @Micheal, I still reuse the RAM_SYNC flag, it is much straightforward to > parse > all the flags in one parameter. > > Changes in v7: > * Micheal: [3,4,6]/6 limited the "sync" flag only on a nvdimm > backend.(pmem=on) > > Changes in v6: > * Pankaj: 3/7 are squashed with 2/7 > * Pankaj: 7/7 update comments to "consistent filesystem metadata". > * Pankaj, Igor: 1/7 Added Reviewed-by in patch-1/7 > * Stefan, 4/7 move the include header from "/linux/mman.h" to "osdep.h" > * Stefan, 5/7 Add missing "munmap" > * Stefan, 2/7 refine the shared/flag. > > Changes in v5: > * Add patch 1 to fix a memory leak issue. > * Refine the patch 4-6 > * Remove the patch 3 as we already change the parameter from "shared" to > "flags" > > Changes in v4: > * Add patch 1-3 to switch some functions to a single 'flags' > parameters. (Michael S. Tsirkin) > * v3 patch 1-3 become v4 patch 4-6. > * Patch 4: move definitions of MAP_SYNC and MAP_SHARED_VALIDATE to a > new header file under include/standard-headers/linux/. (Michael S. > Tsirkin) > * Patch 6: refine the description of the 'sync' option. (Michael S. Tsirkin) > > Changes in v3: > * Patch 1: add MAP_SHARED_VALIDATE in both sync=on and sync=auto > cases, and add back the retry mechanism. MAP_SYNC will be ignored > by Linux kernel 4.15 if MAP_SHARED_VALIDATE is missed. > * Patch 1: define MAP_SYNC and MAP_SHARED_VALIDATE as 0 on non-Linux > platforms in order to make qemu_ram_mmap() compile on those platforms. > * Patch 2&3: include more information in error messages of > memory-backend in hope to help user to identify the error. > (Dr. David Alan Gilbert) > * Patch 3: fix typo in the commit message. (Dr. David Alan Gilbert) > > Changes in v2: > * Add 'sync' option to control the use of MAP_SYNC. (Eduardo Habkost) > * Remove the unnecessary set of MAP_SHARED_VALIDATE in some cases and > the retry mechanism in qemu_ram_mmap(). (Michael S. Tsirkin) > * Move OS dependent definitions of MAP_SYNC and MAP_SHARED_VALIDATE > to osdep.h. (Michael S. Tsirkin) > > Zhang Yi (5): > util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap > scripts/update-linux-headers: add linux/mman.h > linux-headers: add linux/mman.h. > util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() > docs: Added MAP_SYNC documentation > > Zhang Yi (5): > util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap > scripts/update-linux-headers: add linux/mman.h > linux-headers: add linux/mman.h. > util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() > docs: Added MAP_SYNC documentation > > docs/nvdimm.txt | 25 ++++++- > exec.c | 2 +- > include/qemu/mmap-alloc.h | 21 +++++- > linux-headers/asm-arm/mman.h | 4 ++ > linux-headers/asm-arm64/mman.h | 1 + > linux-headers/asm-generic/hugetlb_encode.h | 36 ++++++++++ > linux-headers/asm-generic/mman-common.h | 77 ++++++++++++++++++++ > linux-headers/asm-generic/mman.h | 24 +++++++ > linux-headers/asm-mips/mman.h | 108 > +++++++++++++++++++++++++++++ > linux-headers/asm-powerpc/mman.h | 39 +++++++++++ > linux-headers/asm-s390/mman.h | 1 + > linux-headers/asm-x86/mman.h | 31 +++++++++ > linux-headers/linux/mman.h | 38 ++++++++++ > qemu-options.hx | 5 ++ > scripts/update-linux-headers.sh | 6 +- > util/mmap-alloc.c | 51 +++++++++++++- > util/oslib-posix.c | 2 +- > 17 files changed, 460 insertions(+), 11 deletions(-) > create mode 100644 linux-headers/asm-arm/mman.h > create mode 100644 linux-headers/asm-arm64/mman.h > create mode 100644 linux-headers/asm-generic/hugetlb_encode.h > create mode 100644 linux-headers/asm-generic/mman-common.h > create mode 100644 linux-headers/asm-generic/mman.h > create mode 100644 linux-headers/asm-mips/mman.h > create mode 100644 linux-headers/asm-powerpc/mman.h > create mode 100644 linux-headers/asm-s390/mman.h > create mode 100644 linux-headers/asm-x86/mman.h > create mode 100644 linux-headers/linux/mman.h > > -- > 2.7.4 This patch series look good to me. With updated patch 5, feel free to add. Reviewed-by: Pankaj Gupta <pagupta@redhat.com> > > >
Linux 4.15 introduces a new mmap flag MAP_SYNC, which can be used to guarantee the write persistence to mmap'ed files supporting DAX (e.g., files on ext4/xfs file system mounted with '-o dax'). A description of MAP_SYNC and MAP_SHARED_VALIDATE can be found at https://patchwork.kernel.org/patch/10028151/ In order to make sure that the file metadata is in sync after a fault while we are writing a shared DAX supporting backend files, this patch-set enables QEMU to use MAP_SYNC flag for memory-backend-dax-file. As the DAX vs DMA truncated issue was solved, we refined the code and send out this feature for the v5 version. We will pass MAP_SYNC to mmap(2); if MAP_SYNC is supported and 'share=on' & 'pmem=on'. Or QEMU will not pass this flag to mmap(2) Test with below cases: 1. pmem=on is set, shared=on is set, MAP_SYNC supported: a: backend is a dax supporting file. 1) start VM1 with options: -object memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_1},size=${DAX_FILE_SIZE_1},align=128M,pmem=on,share=on -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. 2) start VM2 with options: -object memory-backend-file,id=nv_be4,share,mem-path=${DAX_FILE_2,size=${DAX_FILE_SIZE_2},align=128M,pmem=on,share=on -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. 3) live migrate from VM1 to VM2. 4) Suddly let Host crash or power failure. 5) check DAX_FILE_1 and DAX_FILE_2, no corrupt. b: backend is a regular file. 1) start with options -object memory-backend-file,id=nv_be4,share,mem-path=${REG_FILE},size=${REG_FILE_SIZE},align=128M,pmem=on,share=on -device nvdimm,id=nv4,memdev=nv_be4,label-size=2M. will warning "failed to validate with mapping flags: Operation not supported" FILE_1 and FILE_2 random corrupt. 2. Other cases: FILE_1 and FILE_2 random corrupt. Changes in V13: * 4/5 Micheal: move the inlcude to mmap_alloc.c. * 4/5 Micheal: refine the warning message. * 5/5 Micheal: refine the Documentations. Changes in V12: * 2/5: Micheal: Update update-linux-headers.sh * 3/5: Micheal: Use script update add linux/mman.h * 4/5: Pankaj,Micheal: 1) fallback to mmap without MAP_SYNC & MAP_SHARED_VALIDATE if sync not supported or failed 2) Replace the include with 3/5 added linux/mman.h * 5/5: Micheal: Refine the Documentations. Changes in V11: * 1/3: Micheal: Change to just add a bool is_pmem in qemu_ram_mmap. * 2/3: Micheal: Fix the compatibility for old kernel. * 2/3&3/3: Micheal&Eduardo :Update the behavior below: Waning at no-dax and continue without MAP_SYNC. Test if fails again for compatibility, then remove the MAP_VALIDATE and silently proceed. Changes in V10: * 4/4: refine the document. * 3/4: Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> * 2/4: refine the commit message, Added MAP_SHARED_VALIDATE. * 2/4: Fix the wrong include header Changes in V9: * 1/6: Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> * 2/6: New Added: Micheal: use sparse feature define RAM_FLAG. since I don't have much knowledge about the sparse feature, @Micheal Could you add some documentation/commit message on this patch? Thank you very much. * 3/6: from 2/5: Eduardo: updated the commit message. * 4/6: from 3/5: Micheal: don't ignore MAP_SYNC failures silently. * 5/6: from 4/5: Eduardo: updated the commit message. * 6/6: from 5/5: Micheal: Drop the sync option, document the MAP_SYNC. Changes in v8: * Micheal: 3/5, remove the duplicated define in the os_dep.h * Micheal: 2/5, make type define safety. * Micheal: 2/5, fixed the incorrect define MAP_SHARE on qemu_anon_ram_alloc. * 4/6 removed, we remove the on/off/auto define of sync, as by now, MAP_SYNC only worked with pmem=on. * @Micheal, I still reuse the RAM_SYNC flag, it is much straightforward to parse all the flags in one parameter. Changes in v7: * Micheal: [3,4,6]/6 limited the "sync" flag only on a nvdimm backend.(pmem=on) Changes in v6: * Pankaj: 3/7 are squashed with 2/7 * Pankaj: 7/7 update comments to "consistent filesystem metadata". * Pankaj, Igor: 1/7 Added Reviewed-by in patch-1/7 * Stefan, 4/7 move the include header from "/linux/mman.h" to "osdep.h" * Stefan, 5/7 Add missing "munmap" * Stefan, 2/7 refine the shared/flag. Changes in v5: * Add patch 1 to fix a memory leak issue. * Refine the patch 4-6 * Remove the patch 3 as we already change the parameter from "shared" to "flags" Changes in v4: * Add patch 1-3 to switch some functions to a single 'flags' parameters. (Michael S. Tsirkin) * v3 patch 1-3 become v4 patch 4-6. * Patch 4: move definitions of MAP_SYNC and MAP_SHARED_VALIDATE to a new header file under include/standard-headers/linux/. (Michael S. Tsirkin) * Patch 6: refine the description of the 'sync' option. (Michael S. Tsirkin) Changes in v3: * Patch 1: add MAP_SHARED_VALIDATE in both sync=on and sync=auto cases, and add back the retry mechanism. MAP_SYNC will be ignored by Linux kernel 4.15 if MAP_SHARED_VALIDATE is missed. * Patch 1: define MAP_SYNC and MAP_SHARED_VALIDATE as 0 on non-Linux platforms in order to make qemu_ram_mmap() compile on those platforms. * Patch 2&3: include more information in error messages of memory-backend in hope to help user to identify the error. (Dr. David Alan Gilbert) * Patch 3: fix typo in the commit message. (Dr. David Alan Gilbert) Changes in v2: * Add 'sync' option to control the use of MAP_SYNC. (Eduardo Habkost) * Remove the unnecessary set of MAP_SHARED_VALIDATE in some cases and the retry mechanism in qemu_ram_mmap(). (Michael S. Tsirkin) * Move OS dependent definitions of MAP_SYNC and MAP_SHARED_VALIDATE to osdep.h. (Michael S. Tsirkin) Zhang Yi (5): util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap scripts/update-linux-headers: add linux/mman.h linux-headers: add linux/mman.h. util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() docs: Added MAP_SYNC documentation Zhang Yi (5): util/mmap-alloc: Add a 'is_pmem' parameter to qemu_ram_mmap scripts/update-linux-headers: add linux/mman.h linux-headers: add linux/mman.h. util/mmap-alloc: support MAP_SYNC in qemu_ram_mmap() docs: Added MAP_SYNC documentation docs/nvdimm.txt | 25 ++++++- exec.c | 2 +- include/qemu/mmap-alloc.h | 21 +++++- linux-headers/asm-arm/mman.h | 4 ++ linux-headers/asm-arm64/mman.h | 1 + linux-headers/asm-generic/hugetlb_encode.h | 36 ++++++++++ linux-headers/asm-generic/mman-common.h | 77 ++++++++++++++++++++ linux-headers/asm-generic/mman.h | 24 +++++++ linux-headers/asm-mips/mman.h | 108 +++++++++++++++++++++++++++++ linux-headers/asm-powerpc/mman.h | 39 +++++++++++ linux-headers/asm-s390/mman.h | 1 + linux-headers/asm-x86/mman.h | 31 +++++++++ linux-headers/linux/mman.h | 38 ++++++++++ qemu-options.hx | 5 ++ scripts/update-linux-headers.sh | 6 +- util/mmap-alloc.c | 51 +++++++++++++- util/oslib-posix.c | 2 +- 17 files changed, 460 insertions(+), 11 deletions(-) create mode 100644 linux-headers/asm-arm/mman.h create mode 100644 linux-headers/asm-arm64/mman.h create mode 100644 linux-headers/asm-generic/hugetlb_encode.h create mode 100644 linux-headers/asm-generic/mman-common.h create mode 100644 linux-headers/asm-generic/mman.h create mode 100644 linux-headers/asm-mips/mman.h create mode 100644 linux-headers/asm-powerpc/mman.h create mode 100644 linux-headers/asm-s390/mman.h create mode 100644 linux-headers/asm-x86/mman.h create mode 100644 linux-headers/linux/mman.h