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 <hu...@google.com> Acked-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> --- 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); } /*