xfs: use i_mmaplock on read faults

Browse source

commit de0e8c20ba upstream.

Take the i_mmaplock over read page faults. These come through the
->fault callout, so we need to wrap the generic implementation
with the i_mmaplock. While there, add tracepoints for the read
fault as it passes through XFS.

This gives us a lock order of mmap_sem -> i_mmaplock -> page_lock
-> i_lock.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Jan Kara <jack@suse.cz>
Cc: xfs@oss.sgi.com

...

This commit is contained in:

Dave Chinner 2015-02-23 21:44:19 +11:00 • committed by Ben Hutchings

parent e34915e9a9

commit b248005489

2 changed files with 29 additions and 1 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

28

fs/xfs/xfs_file.c

View file

2

fs/xfs/xfs_trace.h

View file