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authorDave Chinner <david@fromorbit.com>2014-06-10 01:32:56 +0400
committerDave Chinner <david@fromorbit.com>2014-06-10 01:32:56 +0400
commit7691283d0561a350b7517be94818669fb5e3d910 (patch)
tree3b939ee86e763c22c6ead988bf62de58e1981915 /fs/xfs/xfs_bmap_util.c
parent8612c7e594808e4a67bc2d4661f5925df2be3f51 (diff)
parent30265117ee1e23fa91920f337a3ea91207f700dc (diff)
downloadlinux-7691283d0561a350b7517be94818669fb5e3d910.tar.xz
Merge branch 'xfs-misc-fixes-3-for-3.16' into for-next
Diffstat (limited to 'fs/xfs/xfs_bmap_util.c')
-rw-r--r--fs/xfs/xfs_bmap_util.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 057f671811d6..703b3ec1796c 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -258,14 +258,23 @@ xfs_bmapi_allocate_worker(
struct xfs_bmalloca *args = container_of(work,
struct xfs_bmalloca, work);
unsigned long pflags;
+ unsigned long new_pflags = PF_FSTRANS;
- /* we are in a transaction context here */
- current_set_flags_nested(&pflags, PF_FSTRANS);
+ /*
+ * we are in a transaction context here, but may also be doing work
+ * in kswapd context, and hence we may need to inherit that state
+ * temporarily to ensure that we don't block waiting for memory reclaim
+ * in any way.
+ */
+ if (args->kswapd)
+ new_pflags |= PF_MEMALLOC | PF_SWAPWRITE | PF_KSWAPD;
+
+ current_set_flags_nested(&pflags, new_pflags);
args->result = __xfs_bmapi_allocate(args);
complete(args->done);
- current_restore_flags_nested(&pflags, PF_FSTRANS);
+ current_restore_flags_nested(&pflags, new_pflags);
}
/*
@@ -284,6 +293,7 @@ xfs_bmapi_allocate(
args->done = &done;
+ args->kswapd = current_is_kswapd();
INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
queue_work(xfs_alloc_wq, &args->work);
wait_for_completion(&done);