A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-28 10:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

cpusets: update mems allowed in page allocator

Browse source 
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().

[[email protected]: add comment]
Signed-off-by: David Rientjes <[email protected]>
Cc: Paul Menage <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Rientjes 2008-11-12 13:25:37 -08:00 • committed by Linus Torvalds
commit e33c3b5e17
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
mm/page_alloc.c
View file

@ -1561,6 +1561,10 @@ nofail_alloc:
/* We now go into synchronous reclaim */
cpuset_memory_pressure_bump();
/*
* The task's cpuset might have expanded its set of allowable nodes
*/
cpuset_update_task_memory_state();
p->flags |= PF_MEMALLOC;
reclaim_state.reclaimed_slab = 0;
p->reclaim_state = &reclaim_state;