From: Omar Sandoval <osandov@xxxxxx> 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. Changed from v1: use mutex_lock_killable() instead of mutex_lock_interruptible(). Thanks! Omar Sandoval (2): loop: don't call into filesystem while holding lo_ctl_mutex loop: use killable lock in ioctls drivers/block/loop.c | 65 +++++++++++++++++++++++++++++++++------------------- 1 file changed, 42 insertions(+), 23 deletions(-) -- 2.16.2
