The patch titled
mm: micro optimise zone_watermark_ok
has been added to the -mm tree. Its filename is
mm-micro-optimise-zone_watermark_ok.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: micro optimise zone_watermark_ok
From: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Having min be a signed quantity means gcc can't turn high latency divides
into shifts. There happen to be two such divides for GFP_ATOMIC (ie.
networking, ie. important) allocations, one of which depends on the other.
Fixing this makes code smaller as a bonus.
Shame on somebody (probably me).
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/page_alloc.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletion(-)
diff -puN mm/page_alloc.c~mm-micro-optimise-zone_watermark_ok mm/page_alloc.c
--- a/mm/page_alloc.c~mm-micro-optimise-zone_watermark_ok
+++ a/mm/page_alloc.c
@@ -889,7 +889,8 @@ int zone_watermark_ok(struct zone *z, in
int classzone_idx, int alloc_flags)
{
/* free_pages my go negative - that's OK */
- long min = mark, free_pages = z->free_pages - (1 << order) + 1;
+ unsigned long min = mark;
+ long free_pages = z->free_pages - (1 << order) + 1;
int o;
if (alloc_flags & ALLOC_HIGH)
_
Patches currently in -mm which might be from nickpiggin@xxxxxxxxxxxx are
fix-longstanding-load-balancing-bug-in-the-scheduler.patch
git-gfs2.patch
radix-tree-rcu-lockless-readside-semicolon.patch
adix-tree-rcu-lockless-readside-update-tidy.patch
adix-tree-rcu-lockless-readside-fix-3.patch
radix-tree-cleanup-radix_tree_deref_slot-and.patch
cleanup-radix_tree_derefreplace_slot-calling-conventions.patch
cleanup-radix_tree_derefreplace_slot-calling-conventions-warning-fixes.patch
mm-remove_mapping-safeness-fix.patch
page-invalidation-cleanup.patch
mm-micro-optimise-zone_watermark_ok.patch
do_sched_setscheduler-dont-take-tasklist_lock.patch
introduce-is_rt_policy-helper.patch
sched_setscheduler-fix-policy-checks.patch
reparent_to_init-use-has_rt_policy.patch
select_bad_process-kill-a-bogus-pf_dead-task_dead-check.patch
oom_kill_task-cleanup-mm-checks.patch
sched-remove-unnecessary-sched-group-allocations.patch
sched-remove-unnecessary-sched-group-allocations-fix.patch
lower-migration-thread-stop-machine-prio.patch
sched-generic-sched_group-cpu-power-setup.patch
scheduler-numa-aware-placement-of-sched_group_allnodes.patch
sched2-sched-domain-sysctl.patch
-
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