Messages in this thread | | | Date | Tue, 17 Mar 2020 22:04:56 +0000 | From | Wei Yang <> | Subject | Re: [PATCH v2 4/8] powernv/memtrace: always online added memory blocks |
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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
-- Wei Yang Help you, Help me
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