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| author | Hugh Dickins <hughd@google.com> | 2016-09-24 03:24:23 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-09-24 18:20:01 (GMT) |
| commit | 71664665c3e3ca5ff61ef5fc65480f82cd575eb2 (patch) | |
| tree | 96572603989e027b559a3e117a773bb62ec434e3 /mm/shmem.c | |
| parent | 3089bf614c7e2fd441ee001e3ff3d18326f6f091 (diff) | |
| download | linux-71664665c3e3ca5ff61ef5fc65480f82cd575eb2.tar.xz | |
huge tmpfs: fix Committed_AS leak
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@google.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -270,7 +270,7 @@ bool shmem_charge(struct inode *inode, long pages) 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, long pages) if (sbinfo->max_blocks) percpu_counter_sub(&sbinfo->used_blocks, pages); + shmem_unacct_blocks(info->flags, pages); } /* |