Under swapping load on huge tmpfs, /proc/meminfo's Committed_AS grows
bigger and bigger: just a cosmetic issue for most users, but disabling
for those who run without overcommit (/proc/sys/vm/overcommit_memory 2).
shmem_uncharge() was forgetting to unaccount __vm_enough_memory's charge,
and shmem_charge() was forgetting it on the filesystem-full error path.
Fixes: 800d8c63b2e9 ("shmem: add huge pages support")
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
mm/shmem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- 4.8-rc7/mm/shmem.c 2016-08-14 20:17:02.388843463 -0700
+++ linux/mm/shmem.c 2016-09-22 09:29:15.462690346 -0700
@@ -270,7 +270,7 @@ bool shmem_charge(struct inode *inode, l
info->alloced -= pages;
shmem_recalc_inode(inode);
spin_unlock_irqrestore(&info->lock, flags);
-
+ shmem_unacct_blocks(info->flags, pages);
return false;
}
percpu_counter_add(&sbinfo->used_blocks, pages);
@@ -291,6 +291,7 @@ void shmem_uncharge(struct inode *inode,
if (sbinfo->max_blocks)
percpu_counter_sub(&sbinfo->used_blocks, pages);
+ shmem_unacct_blocks(info->flags, pages);
}
/*
--
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