xfs: Print name and pid when memory allocation loops
This patch adds comm name and pid to warning messages printed by
kmem_alloc(), kmem_zone_alloc() and xfs_buf_allocate_memory().
This will help telling which memory allocations (e.g. kernel worker
threads, OOM victim tasks, neither) are stalling because these functions
are passing __GFP_NOWARN which suppresses not only backtrace but comm name
and pid.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 8ecffb3..cac62e1 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -354,7 +354,8 @@
*/
if (!(++retries % 100))
xfs_err(NULL,
- "possible memory allocation deadlock in %s (mode:0x%x)",
+ "%s(%u) possible memory allocation deadlock in %s (mode:0x%x)",
+ current->comm, current->pid,
__func__, gfp_mask);
XFS_STATS_INC(xb_page_retries);