Patch for quota deadlock

Kris Kennaway kris at obsecurity.org
Tue Feb 28 02:00:42 PST 2006


On Tue, Feb 28, 2006 at 11:58:02AM +0200, Niki Denev wrote:
> On Tuesday 28 February 2006 09:51, Kris Kennaway wrote:
> > On Tue, Feb 28, 2006 at 08:40:37AM +0100, Oliver Brandmueller wrote:
> > > Anyway, I'll discuss with my colleagues and we'll see if we want to take
> > > the risk.
> >
> > Thanks, it would be a big help if you're willing to try.
> >
> > Kris
> 
> I'm jumping here from the [snaphost timestamps] thread.
> 
> Here is what happened when i compiled the kernel with QUOTAS enabled, 
> enable_quotas="YES" in rc.conf, and LK_NOWAIT patch applied :

> Enabling quotas:KDB: stack backtrace:
> vfs_badlock() at vfs_badlock+0x95
> assert_vop_locked() at assert_vop_locked+0x77
> quotaon() at quotaon+0x182
> ufs_quotactl() at ufs_quotactl+0x150
> quotactl() at quotactl+0x15c
> syscall() at syscall+0x642
> Xfast_syscall() at Xfast_syscall+0xa8
> --- syscall (148, FreeBSD ELF64, quotactl), rip = 0x80068671c, rsp = 

Thanks, I forgot about this.  You'll need these patches too:

http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/ufs/ufs/ufs_quota.c.diff?r1=1.77&r2=1.78
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/ufs/ufs/ufs_quota.c.diff?r1=1.78&r2=1.79

Kris
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