| Message ID | 20200317104942.11178-5-david@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/8] drivers/base/memory: rename MMOP_ONLINE_KEEP to MMOP_ONLINE | expand |
On Tue 17-03-20 11:49:38, David Hildenbrand wrote: > Let's always try to online the re-added memory blocks. In case add_memory() > already onlined the added memory blocks, the first device_online() call > will fail and stop processing the remaining memory blocks. > > This avoids manually having to check memhp_auto_online. > > Note: PPC always onlines all hotplugged memory directly from the kernel > as well - something that is handled by user space on other > architectures. > > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Cc: Michal Hocko <mhocko@kernel.org> > Cc: Oscar Salvador <osalvador@suse.de> > Cc: "Rafael J. Wysocki" <rafael@kernel.org> > Cc: Baoquan He <bhe@redhat.com> > Cc: Wei Yang <richard.weiyang@gmail.com> > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Michal Hocko <mhocko@suse.com> > --- > arch/powerpc/platforms/powernv/memtrace.c | 14 ++++---------- > 1 file changed, 4 insertions(+), 10 deletions(-) > > diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c > index d6d64f8718e6..13b369d2cc45 100644 > --- a/arch/powerpc/platforms/powernv/memtrace.c > +++ b/arch/powerpc/platforms/powernv/memtrace.c > @@ -231,16 +231,10 @@ static int memtrace_online(void) > continue; > } > > - /* > - * If kernel isn't compiled with the auto online option > - * we need to online the memory ourselves. > - */ > - if (!memhp_auto_online) { > - lock_device_hotplug(); > - walk_memory_blocks(ent->start, ent->size, NULL, > - online_mem_block); > - unlock_device_hotplug(); > - } > + lock_device_hotplug(); > + walk_memory_blocks(ent->start, ent->size, NULL, > + online_mem_block); > + unlock_device_hotplug(); > > /* > * Memory was added successfully so clean up references to it > -- > 2.24.1
On Tue, Mar 17, 2020 at 11:49:38AM +0100, David Hildenbrand wrote: >Let's always try to online the re-added memory blocks. In case add_memory() >already onlined the added memory blocks, the first device_online() call >will fail and stop processing the remaining memory blocks. > >This avoids manually having to check memhp_auto_online. > >Note: PPC always onlines all hotplugged memory directly from the kernel >as well - something that is handled by user space on other >architectures. > >Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> >Cc: Paul Mackerras <paulus@samba.org> >Cc: Michael Ellerman <mpe@ellerman.id.au> >Cc: Andrew Morton <akpm@linux-foundation.org> >Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> >Cc: Michal Hocko <mhocko@kernel.org> >Cc: Oscar Salvador <osalvador@suse.de> >Cc: "Rafael J. Wysocki" <rafael@kernel.org> >Cc: Baoquan He <bhe@redhat.com> >Cc: Wei Yang <richard.weiyang@gmail.com> >Cc: linuxppc-dev@lists.ozlabs.org >Signed-off-by: David Hildenbrand <david@redhat.com> Looks good. Reviewed-by: Wei Yang <richard.weiyang@gmail.com> >--- > arch/powerpc/platforms/powernv/memtrace.c | 14 ++++---------- > 1 file changed, 4 insertions(+), 10 deletions(-) > >diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c >index d6d64f8718e6..13b369d2cc45 100644 >--- a/arch/powerpc/platforms/powernv/memtrace.c >+++ b/arch/powerpc/platforms/powernv/memtrace.c >@@ -231,16 +231,10 @@ static int memtrace_online(void) > continue; > } > >- /* >- * If kernel isn't compiled with the auto online option >- * we need to online the memory ourselves. >- */ >- if (!memhp_auto_online) { >- lock_device_hotplug(); >- walk_memory_blocks(ent->start, ent->size, NULL, >- online_mem_block); >- unlock_device_hotplug(); >- } >+ lock_device_hotplug(); >+ walk_memory_blocks(ent->start, ent->size, NULL, >+ online_mem_block); >+ unlock_device_hotplug(); > > /* > * Memory was added successfully so clean up references to it >-- >2.24.1
David Hildenbrand <david@redhat.com> writes: > Let's always try to online the re-added memory blocks. In case add_memory() > already onlined the added memory blocks, the first device_online() call > will fail and stop processing the remaining memory blocks. > > This avoids manually having to check memhp_auto_online. > > Note: PPC always onlines all hotplugged memory directly from the kernel > as well - something that is handled by user space on other > architectures. > > Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> > Cc: Paul Mackerras <paulus@samba.org> > Cc: Michael Ellerman <mpe@ellerman.id.au> > Cc: Andrew Morton <akpm@linux-foundation.org> > Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > Cc: Michal Hocko <mhocko@kernel.org> > Cc: Oscar Salvador <osalvador@suse.de> > Cc: "Rafael J. Wysocki" <rafael@kernel.org> > Cc: Baoquan He <bhe@redhat.com> > Cc: Wei Yang <richard.weiyang@gmail.com> > Cc: linuxppc-dev@lists.ozlabs.org > Signed-off-by: David Hildenbrand <david@redhat.com> > --- > arch/powerpc/platforms/powernv/memtrace.c | 14 ++++---------- > 1 file changed, 4 insertions(+), 10 deletions(-) Fine by me. Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) cheers > diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c > index d6d64f8718e6..13b369d2cc45 100644 > --- a/arch/powerpc/platforms/powernv/memtrace.c > +++ b/arch/powerpc/platforms/powernv/memtrace.c > @@ -231,16 +231,10 @@ static int memtrace_online(void) > continue; > } > > - /* > - * If kernel isn't compiled with the auto online option > - * we need to online the memory ourselves. > - */ > - if (!memhp_auto_online) { > - lock_device_hotplug(); > - walk_memory_blocks(ent->start, ent->size, NULL, > - online_mem_block); > - unlock_device_hotplug(); > - } > + lock_device_hotplug(); > + walk_memory_blocks(ent->start, ent->size, NULL, > + online_mem_block); > + unlock_device_hotplug(); > > /* > * Memory was added successfully so clean up references to it > -- > 2.24.1
diff --git a/arch/powerpc/platforms/powernv/memtrace.c b/arch/powerpc/platforms/powernv/memtrace.c index d6d64f8718e6..13b369d2cc45 100644 --- a/arch/powerpc/platforms/powernv/memtrace.c +++ b/arch/powerpc/platforms/powernv/memtrace.c @@ -231,16 +231,10 @@ static int memtrace_online(void) continue; } - /* - * If kernel isn't compiled with the auto online option - * we need to online the memory ourselves. - */ - if (!memhp_auto_online) { - lock_device_hotplug(); - walk_memory_blocks(ent->start, ent->size, NULL, - online_mem_block); - unlock_device_hotplug(); - } + lock_device_hotplug(); + walk_memory_blocks(ent->start, ent->size, NULL, + online_mem_block); + unlock_device_hotplug(); /* * Memory was added successfully so clean up references to it
Let's always try to online the re-added memory blocks. In case add_memory() already onlined the added memory blocks, the first device_online() call will fail and stop processing the remaining memory blocks. This avoids manually having to check memhp_auto_online. Note: PPC always onlines all hotplugged memory directly from the kernel as well - something that is handled by user space on other architectures. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Michal Hocko <mhocko@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Baoquan He <bhe@redhat.com> Cc: Wei Yang <richard.weiyang@gmail.com> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: David Hildenbrand <david@redhat.com> --- arch/powerpc/platforms/powernv/memtrace.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-)