The patch titled
cpuset: might_sleep_if check in cpuset_zones_allowed
has been added to the -mm tree. Its filename is
cpuset-might_sleep_if-check-in-cpuset_zones_allowed.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: cpuset: might_sleep_if check in cpuset_zones_allowed
From: Paul Jackson <pj@xxxxxxx>
It's too easy to incorrectly call cpuset_zone_allowed() in an atomic
context without __GFP_HARDWALL set, and when done, it is not noticed until
a tight memory situation forces allocations to be tried outside the current
cpuset.
Add a 'might_sleep_if()' check, to catch this earlier on, instead of
waiting for a similar check in the mutex_lock() code, which is only rarely
invoked.
Signed-off-by: Paul Jackson <pj@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/cpuset.c | 1 +
1 files changed, 1 insertion(+)
diff -puN kernel/cpuset.c~cpuset-might_sleep_if-check-in-cpuset_zones_allowed kernel/cpuset.c
--- devel/kernel/cpuset.c~cpuset-might_sleep_if-check-in-cpuset_zones_allowed 2006-05-18 02:09:26.000000000 -0700
+++ devel-akpm/kernel/cpuset.c 2006-05-18 02:09:26.000000000 -0700
@@ -2261,6 +2261,7 @@ int __cpuset_zone_allowed(struct zone *z
if (in_interrupt())
return 1;
node = z->zone_pgdat->node_id;
+ might_sleep_if(!(gfp_mask & __GFP_HARDWALL));
if (node_isset(node, current->mems_allowed))
return 1;
if (gfp_mask & __GFP_HARDWALL) /* If hardwall request, stop here */
_
Patches currently in -mm which might be from pj@xxxxxxx are
cpuset-might-sleep-checking-zones-allowed-fix.patch
cpuset-update-cpuset_zones_allowed-comment.patch
cpuset-might_sleep_if-check-in-cpuset_zones_allowed.patch
proc-dont-lock-task_structs-indefinitely.patch
proc-dont-lock-task_structs-indefinitely-task_mmu-small-fixes.patch
-
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