The patch titled
cpusets: update mems allowed in page allocator
has been added to the -mm tree. Its filename is
cpusets-update-mems-allowed-in-page-allocator.patch
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------------------------------------------------------
Subject: cpusets: update mems allowed in page allocator
From: David Rientjes <rientjes@xxxxxxxxxx>
If all allowable memory is unreclaimable, it is possible to loop forever
in the page allocator for ~__GFP_NORETRY allocations.
During this time, it is also possible for a task's cpuset to expand its
set of allowable nodes so that it now includes free memory. The cached
copy of this set, current->mems_allowed, is stale, however, since there
has not been a subsequent call to cpuset_update_task_memory_state().
The cached copy of the set of allowable nodes is now updated in the page
allocator's slow path so the additional memory is available to
get_page_from_freelist().
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/page_alloc.c~cpusets-update-mems-allowed-in-page-allocator mm/page_alloc.c
--- a/mm/page_alloc.c~cpusets-update-mems-allowed-in-page-allocator
+++ a/mm/page_alloc.c
@@ -1561,6 +1561,7 @@ nofail_alloc:
/* We now go into synchronous reclaim */
cpuset_memory_pressure_bump();
+ cpuset_update_task_memory_state();
p->flags |= PF_MEMALLOC;
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;
_
Patches currently in -mm which might be from rientjes@xxxxxxxxxx are
oom-do-not-dump-task-state-for-non-thread-group-leaders.patch
vmemmap-warn-about-page_structs-with-remote-distance.patch
cpusets-update-mems-allowed-in-page-allocator.patch
oom-fix-zone_scan_mutex-name.patch
oom-print-triggering-tasks-cpuset-and-mems-allowed.patch
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