From: Alasdair G Kergon <agk@redhat.com>
To: "Lentes, Bernd" <bernd.lentes@helmholtz-muenchen.de>
Cc: LVM general discussion and development <linux-lvm@redhat.com>
Subject: Re: [linux-lvm] problem with lvcreate and redirection of stdout/stderr
Date: Wed, 20 Aug 2014 16:50:10 +0100 [thread overview]
Message-ID: <20140820155010.GC23914@agk-dp.fab.redhat.com> (raw)
In-Reply-To: <15785B7E063D464C86DD482FCAE4EBA501AA8A21A0F1@XCH11.scidom.de>
On Wed, Aug 20, 2014 at 05:27:52PM +0200, Lentes, Bernd wrote:
> lvcreate -v -L 45G -n lv_root_snapshot -s vg1/lv_root >> /var/log/update.log 2>&1
> lvcreate Suspending vg1-lv_root (252:0) with filesystem sync with device flush
/var/log is presumably part of a filesystem on the same LV that is getting its I/O
paused for a brief moment while the snapshot is taken.
1) Run lvm dumpconfig log/activation to double-check this is not set to 1.
2) What filesystem is this and precisely what kernel? (cat /proc/mounts)
3) Try to obtain a stack trace at the point where this locks up e.g.
echo t > /proc/sysrq-trigger followed by dmesg (or divert your logging
of kernel messages to a different filesystem outside the snapshot).
Alasdair
next prev parent reply other threads:[~2014-08-20 15:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-20 15:27 [linux-lvm] problem with lvcreate and redirection of stdout/stderr Lentes, Bernd
2014-08-20 15:50 ` Alasdair G Kergon [this message]
2014-08-20 17:20 ` Lentes, Bernd
2014-08-21 16:57 ` Roger Heflin
2014-08-21 17:20 ` Alasdair G Kergon
-- strict thread matches above, loose matches on Subject: below --
2014-08-22 9:02 Lentes, Bernd
2014-08-22 10:39 ` Alasdair G Kergon
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