[PATCH 0/2] loop: don't hang on lo_ctl_mutex in ioctls

[Omar Sandoval <osandov@osandov.com>]

From: Omar Sandoval <osandov@fb.com>

Hi, Jens,

We hit an issue where a loop device on NFS (yes, I know) got stuck and a
bunch of losetup processes got stuck in uninterruptible sleep waiting
for lo_ctl_mutex as a result. Calling into the filesystem while holding
lo_ctl_mutex isn't necessary, and there's no reason to be
uninterruptible here. These two patches fix this issue, based on your
for-next branch.

Thanks!

Omar Sandoval (2):
  loop: don't call into filesystem while holding lo_ctl_mutex
  loop: use interruptible lock in ioctls

 drivers/block/loop.c | 65 +++++++++++++++++++++++++++++++++-------------------
 1 file changed, 42 insertions(+), 23 deletions(-)

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2.16.2