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-rw-r--r--fs/xfs/linux-2.6/xfs_aops.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index ed9c3db376c3..44ac7a0e2926 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -1049,16 +1049,15 @@ xfs_vm_writepage(
1049 /* 1049 /*
1050 * Refuse to write the page out if we are called from reclaim context. 1050 * Refuse to write the page out if we are called from reclaim context.
1051 * 1051 *
1052 * This is primarily to avoid stack overflows when called from deep 1052 * This avoids stack overflows when called from deeply used stacks in
1053 * used stacks in random callers for direct reclaim, but disabling 1053 * random callers for direct reclaim or memcg reclaim. We explicitly
1054 * reclaim for kswap is a nice side-effect as kswapd causes rather 1054 * allow reclaim from kswapd as the stack usage there is relatively low.
1055 * suboptimal I/O patters, too.
1056 * 1055 *
1057 * This should really be done by the core VM, but until that happens 1056 * This should really be done by the core VM, but until that happens
1058 * filesystems like XFS, btrfs and ext4 have to take care of this 1057 * filesystems like XFS, btrfs and ext4 have to take care of this
1059 * by themselves. 1058 * by themselves.
1060 */ 1059 */
1061 if (current->flags & PF_MEMALLOC) 1060 if ((current->flags & (PF_MEMALLOC|PF_KSWAPD)) == PF_MEMALLOC)
1062 goto out_fail; 1061 goto out_fail;
1063 1062
1064 /* 1063 /*