Jan Kara dcdbed853d quota: Fix deadlock with suspend and quotas ... This script causes a kernel deadlock: set -e DEVICE=/dev/vg1/linear lvchange -ay $DEVICE mkfs.ext3 $DEVICE mount -t ext3 -o usrquota,grpquota $DEVICE /mnt/test quotacheck -gu /mnt/test umount /mnt/test mount -t ext3 -o usrquota,grpquota $DEVICE /mnt/test quotaon /mnt/test dmsetup suspend $DEVICE setquota -u root 1 2 3 4 /mnt/test & sleep 1 dmsetup resume $DEVICE setquota acquired semaphore s_umount for read and then tried to perform a transaction (and waits because the device is suspended). dmsetup resume tries to acquire s_umount for write before resuming the device (and waits for setquota). Fix the deadlock by grabbing a thawed superblock for quota commands which need it. Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>		2012-02-13 20:45:39 -05:00
..
compat.c	quota: split out compat_sys_quotactl support from quota.c	2010-03-05 00:20:25 +01:00
dquot.c	quota: Pass information that quota is stored in system file to userspace	2012-01-12 13:09:09 +01:00
Kconfig	quota: Make QUOTACTL config be selected by its users	2010-10-05 12:16:37 +02:00
Makefile	quota: split out compat_sys_quotactl support from quota.c	2010-03-05 00:20:25 +01:00
netlink.c	include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h	2010-03-30 22:02:32 +09:00
quota_tree.c	quota: Use %pV and __attribute__((format (printf in __quota_error and fix fallout	2011-01-10 19:04:05 +01:00
quota_tree.h	quota: Change quota error message to print out disk and function name	2010-07-21 16:05:58 +02:00
quota_v1.c	quota: Change quota error message to print out disk and function name	2010-07-21 16:05:58 +02:00
quota_v2.c	quota: return -ENOMEM when memory allocation fails	2011-02-24 11:42:44 +01:00
quota.c	quota: Fix deadlock with suspend and quotas	2012-02-13 20:45:39 -05:00
quotaio_v1.h
quotaio_v2.h