On Fri, Mar 04, 2022 at 09:02:15AM -0800, Eric Dumazet wrote:
From: Eric Dumazet <edumazet@xxxxxxxxxx>
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@xxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Shakeel Butt <shakeelb@xxxxxxxxxx> Cc: Wei Xu <weixugc@xxxxxxxxxx> Cc: Greg Thelen <gthelen@xxxxxxxxxx> Cc: Hugh Dickins <hughd@xxxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
