Date: Sun, 7 May 2006 19:26:55 +0400 (MSD) From: Dmitry Morozovsky <marck@rinet.ru> To: Kris Kennaway <kris@obsecurity.org>, Tor Egge <tegge@freebsd.org> Cc: Chris <chrcoluk@gmail.com>, Mike Jakubik <mikej@rogers.com>, stable@freebsd.org, Robert Watson <rwatson@freebsd.org> Subject: Re: quota deadlock on 6.1-RC1 Message-ID: <20060507175330.H19670@woozle.rinet.ru> In-Reply-To: <20060507104355.K92932@woozle.rinet.ru> References: <20060504033300.GA39935@xor.obsecurity.org> <44598615.3040400@rogers.com> <20060504044758.GA41047@xor.obsecurity.org> <44599732.1050905@rogers.com> <20060505080543.GD5466@garage.freebsd.pl> <35c231bf0605051049t2761281ar97b9634b8279b1fd@mail.gmail.com> <445B991F.3050600@rogers.com> <6.2.3.4.0.20060505145259.10d8dca0@64.7.153.2> <3aaaa3a0605061238ib77bb38x6f61eb6cc1c1c6c1@mail.gmail.com> <20060506204720.S46997@fledge.watson.org> <20060506233525.GA52731@xor.obsecurity.org> <20060507104355.K92932@woozle.rinet.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, 7 May 2006, Dmitry Morozovsky wrote:
DM> KK> > Also, as an FYI, several quota-related snapshot fixes went into CVS in the
DM> KK> > last 24-48 hours. Once they've settled for a few weeks, and assuming they
DM> KK> > don't have complex dependencies, they will get merged to RELENG_6.
DM> KK> > Presumably if there is sufficient demand, and they adequately address the
DM> KK> > reports of deadlocks with quotas+snapshots, they could be merged to
DM> KK> > RELENG_6_1 as an errata update.
DM> KK>
DM> KK> The fixes seem to indeed correct all the deadlocks I was seeing. I
DM> KK> don't have time to produce a 6.x patch now though, but it should be a
DM> KK> simple matter for someone else to do.
DM>
DM> FWIW, for me it is much stabler too, at least in normal load patterns. I'll
DM> spend a bit of time to stress-test this on our Samba quota-enabled server
DM> during our long weekend (today-to-Tuesday) to catch possible rare races.
Alas, it is locked again:
root@office:~# ps axlww | grep snap
0 32 0 0 -4 0 0 8 snaplk DL ?? 0:04.55 [bufdaemon]
0 35 0 0 -4 0 0 8 snaplk DL ?? 0:01.11 [softdepflush]
0 45080 45061 0 -4 0 5980 2768 snaplk D ?? 0:00.09 /usr/local/sbin/smbd -D
0 46040 46039 0 -4 0 4492 3616 snaplk D+ p1 0:15.04 rsync -av /ar/winroot/distrib/ /st/winroot/tmp/distrib-temp/
1002 46116 726 0 -4 0 1612 1144 snaplk D+ p3 0:00.00 ls -GF -la /st/.snap/
Unfortunately, this was with non-debug kernel. I'm trying to reproduce the lock
with debug kernel right now, but still with no luck - sometimes machine is
almost hangs but up to now revives 4 or 5 times.
Sincerely,
D.Marck [DM5020, MCK-RIPE, DM3-RIPN]
------------------------------------------------------------------------
*** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru ***
------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20060507175330.H19670>