[lkml]   [2020]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 6/7] mm,hwpoison: Disable pcplists before grabbing a refcount
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]
> Signed-off-by: Oscar Salvador <>

Thank you very much.

Acked-by: Naoya Horiguchi <>
 \ /
  Last update: 2020-11-20 02:34    [W:0.178 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site