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@xxxxxxx/ > > Signed-off-by: Oscar Salvador <osalvador@xxxxxxx> Thank you very much. Acked-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
