Messages in this thread | | | From | HORIGUCHI NAOYA(堀口 直也) <> | Subject | Re: [PATCH 6/7] mm,hwpoison: Disable pcplists before grabbing a refcount | Date | Fri, 20 Nov 2020 01:33:33 +0000 |
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On Thu, Nov 19, 2020 at 11:57:15AM +0100, Oscar Salvador wrote: > Currently, we have a sort of retry mechanism to make sure pages in > pcp-lists are spilled to the buddy system, so we can handle those. > > We can save us this extra checks with the new disable-pcplist mechanism > that is available with [1]. > > zone_pcplist_disable makes sure to 1) disable pcplists, so any page > that is freed up from that point onwards will end up in the buddy > system and 2) drain pcplists, so those pages that already in pcplists > are spilled to buddy. > > With that, we can make a common entry point for grabbing a refcount > from both soft_offline and memory_failure paths that is guarded by > zone_pcplist_disable/zone_pcplist_enable.
This new mechanism provides a better solution to us.
> > [1] https://patchwork.kernel.org/project/linux-mm/cover/20201111092812.11329-1-vbabka@suse.cz/ > > Signed-off-by: Oscar Salvador <osalvador@suse.de>
Thank you very much.
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
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