The patch titled
Subject: mm/vmalloc.c: reduce purge_lock range and hold time of vmap_area_lock
has been added to the -mm tree. Its filename is
reduce-purge_lock-range-and-hold-time-of-vmap_area_lock.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/reduce-purge_lock-range-and-hold-time-of-vmap_area_lock.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/reduce-purge_lock-range-and-hold-time-of-vmap_area_lock.patch
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------------------------------------------------------
From: z00281421 <z00281421@xxxxxxxxxxxxxxxxxxxx>
Subject: mm/vmalloc.c: reduce purge_lock range and hold time of vmap_area_lock
Link: http://lkml.kernel.org/r/1476757521-3262-1-git-send-email-zhouxianrong@xxxxxxxxxx
Signed-off-by: z00281421 <z00281421@xxxxxxxxxxxxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Alexander Kuleshov <kuleshovmail@xxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff -puN mm/vmalloc.c~reduce-purge_lock-range-and-hold-time-of-vmap_area_lock mm/vmalloc.c
--- a/mm/vmalloc.c~reduce-purge_lock-range-and-hold-time-of-vmap_area_lock
+++ a/mm/vmalloc.c
@@ -661,13 +661,18 @@ static void __purge_vmap_area_lazy(unsig
if (nr || force_flush)
flush_tlb_kernel_range(*start, *end);
+ spin_unlock(&purge_lock);
+
if (nr) {
+ unsigned char batch = 0;
spin_lock(&vmap_area_lock);
- llist_for_each_entry_safe(va, n_va, valist, purge_list)
+ llist_for_each_entry_safe(va, n_va, valist, purge_list) {
__free_vmap_area(va);
+ if (!batch++)
+ cond_resched_lock(&vmap_area_lock);
+ }
spin_unlock(&vmap_area_lock);
}
- spin_unlock(&purge_lock);
}
/*
_
Patches currently in -mm which might be from z00281421@xxxxxxxxxxxxxxxxxxxx are
reduce-purge_lock-range-and-hold-time-of-vmap_area_lock.patch
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