From: Dave Jones <davej@redhat.com>
To: Jan Kara <jack@suse.cz>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>, linux-ext4@vger.kernel.org
Subject: Re: ext4_da_release_space:1333: ext4_da_release_space: ino 12, to_free 1 with only 0 reserved data blocks
Date: Wed, 17 Jul 2013 17:42:35 -0400 [thread overview]
Message-ID: <20130717214235.GB12401@redhat.com> (raw)
In-Reply-To: <20130717213850.GA5025@quack.suse.cz>
On Wed, Jul 17, 2013 at 11:38:50PM +0200, Jan Kara wrote:
> > It was running this.. https://github.com/kernelslacker/io-tests/blob/master/setup.sh
> > in a loop. After about 6 hours, that fell out. It made it all the way through
> > every test a few times, which is odd, as the test should be fairly deterministic.
> > Ah, I wasn't capturing the fsx seed. I'll do that on the next run.
> So inode 12 was likely the file used by fsx. OK. Looking at the script
> link, fsx is run as:
> /usr/local/bin/fsx -N 250000 -S0 foo &
> so the seed is always 0. So it is a deterministic test and there must be
> some race with writeback or something that is rarely triggered. Drat.
S0 is special. it means 'use timeofday as seed'
Dave
next prev parent reply other threads:[~2013-07-17 21:42 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-16 20:25 ext4_da_release_space:1333: ext4_da_release_space: ino 12, to_free 1 with only 0 reserved data blocks Dave Jones
2013-07-17 12:53 ` Jan Kara
2013-07-17 14:52 ` Dave Jones
2013-07-17 21:38 ` Jan Kara
2013-07-17 21:42 ` Dave Jones [this message]
2013-07-31 16:39 ` Dave Jones
2013-07-31 18:32 ` Jan Kara
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