[GFS2] flocks from same process trip kernel BUG at fs/gfs2/glock.c:1118!

Browse source

This patch adds a new flag to the gfs2_holder structure GL_FLOCK.
It is set on holders of glocks representing flocks. This flag is
checked in add_to_queue() and a process is permitted to queue more
than one holder onto a glock if it is set. This solves the issue
of a process not being able to do multiple flocks on the same file.
Through a single descriptor, a process can now promote and demote
flocks. Through multiple descriptors a process can now queue
multiple flocks on the same file. There's still the problem of
a process deadlocking itself (because gfs2 blocking locks are not
interruptible) by queueing incompatible deadlock.

Signed-off-by: Abhijith Das <adas@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

...

This commit is contained in:

Abhijith Das 2007-09-13 23:35:27 -05:00 • committed by Steven Whitehouse

parent 1ad38c437f

commit b4c20166dc

3 changed files with 32 additions and 25 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

43

fs/gfs2/glock.c

View file

1

fs/gfs2/glock.h

View file

13

fs/gfs2/ops_file.c

View file