mm: add cond_resched() in gather_pte_stats()
commit a66c0410 upstream. The other pagetable walks in task_mmu.c have a cond_resched() after walking their ptes: add a cond_resched() in gather_pte_stats() too, for reading /proc/<id>/numa_maps. Only pagemap_pmd_range() has a cond_resched() in its (unusually expensive) pmd_trans_huge case: more should probably be added, but leave them unchanged for now. Link: http://lkml.kernel.org/r/alpine.LSU.2.11.1612052157400.13021@eggly.anvils Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: David Rientjes <rientjes@google.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Reported-by: Chen si <cici.cs@alibaba-inc.com> Signed-off-by: Baoyou Xie <baoyou.xie@aliyun.com> Signed-off-by: Wen Yang <wenyang@linux.alibaba.com> Signed-off-by: Zijiang Huang <zijiang.hzj@alibaba-inc.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
bd875c16
Please register or sign in to comment