xfs: enable buffer deadlock postmortem diagnosis via ftrace

Browse source

Create a second buf_trylock tracepoint so that we can distinguish
between a successful and a failed trylock.  With this piece, we can
use a script to look at the ftrace output to detect buffer deadlocks.

[dchinner: update to if/else as per hch's suggestion]

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>

...

This commit is contained in:

Darrick J. Wong 2016-06-21 11:53:28 +10:00 • committed by Dave Chinner

parent 3f94c441e2

commit 479c641273

2 changed files with 6 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

fs/xfs/xfs_buf.c

View file

1

fs/xfs/xfs_trace.h

View file