Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5bf97b1c authored by Tetsuo Handa's avatar Tetsuo Handa Committed by Dave Chinner
Browse files

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: default avatarTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: default avatarDave Chinner <dchinner@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 1f93e4a9

fs/xfs/kmem.c

+6 −4
Original line number Diff line number Diff line
@@ -55,7 +55,8 @@ kmem_alloc(size_t size, xfs_km_flags_t flags) 
			return ptr;

		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__, lflags);

		congestion_wait(BLK_RW_ASYNC, HZ/50);

	} while (1);
@@ -120,7 +121,8 @@ kmem_zone_alloc(kmem_zone_t *zone, xfs_km_flags_t flags) 
			return ptr;

		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__, lflags);

		congestion_wait(BLK_RW_ASYNC, HZ/50);

	} while (1);

fs/xfs/xfs_buf.c

+2 −1
Original line number Diff line number Diff line
@@ -354,7 +354,8 @@ xfs_buf_allocate_memory( 
			 */

			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);