Messages in this thread | | | Date | Sun, 6 Mar 2022 14:15:35 -0800 (PST) | From | David Rientjes <> | Subject | Re: [PATCH v2] mm/page_alloc: call check_new_pages() while zone spinlock is not held |
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On Fri, 4 Mar 2022, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com> > > For high order pages not using pcp, rmqueue() is currently calling > the costly check_new_pages() while zone spinlock is held, > and hard irqs masked. > > This is not needed, we can release the spinlock sooner to reduce > zone spinlock contention. > > Note that after this patch, we call __mod_zone_freepage_state() > before deciding to leak the page because it is in bad state. > > v2: We need to keep interrupts disabled to call __mod_zone_freepage_state() > > Signed-off-by: Eric Dumazet <edumazet@google.com> > Cc: Mel Gorman <mgorman@techsingularity.net> > Cc: Vlastimil Babka <vbabka@suse.cz> > Cc: Michal Hocko <mhocko@kernel.org> > Cc: Shakeel Butt <shakeelb@google.com> > Cc: Wei Xu <weixugc@google.com> > Cc: Greg Thelen <gthelen@google.com> > Cc: Hugh Dickins <hughd@google.com> > Cc: David Rientjes <rientjes@google.com>
Acked-by: David Rientjes <rientjes@google.com>
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