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From: Rich Johnston <rjohnston@sgi.com>
To: <xfs@oss.sgi.com>, Eric Sandeen <sandeen@redhat.com>,
	ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: xfstests: test ext4 statfs
Date: Mon, 29 Oct 2012 09:12:26 -0500	[thread overview]
Message-ID: <508E8ECA.2080204@sgi.com> (raw)
In-Reply-To: <508E8480.5020507@sgi.com>

   xfstests: test ext4 statfs

     Calculating free blocks in ext[234] is surprisingly hard, since
     by default we report "bsd" style df which doesn't count filesystem
     "overhead" blocks as used.

     With a lot of code dedicated to sorting out what to report as
     free, things tend to go wrong surprisingly often.

     Here's a test to actually try to stop the next regression.  ;)

     NB: For bsddf, the kernel currently does not count journal blocks
     as overhead; it probably should.  But the test below looks to have
     the result within 1% of perfection, so it still passes even if
     the kernel doesn't count the journal against free blocks.

Eric,

This patch has been committed to git://oss.sgi.com/xfs/cmds/xfstests, 
master branch, commit 0b2ab695.

Thanks
--Rich




WARNING: multiple messages have this Message-ID (diff)
From: Rich Johnston <rjohnston@sgi.com>
To: xfs@oss.sgi.com, Eric Sandeen <sandeen@redhat.com>,
	ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: xfstests: test ext4 statfs
Date: Mon, 29 Oct 2012 09:12:26 -0500	[thread overview]
Message-ID: <508E8ECA.2080204@sgi.com> (raw)
In-Reply-To: <508E8480.5020507@sgi.com>

   xfstests: test ext4 statfs

     Calculating free blocks in ext[234] is surprisingly hard, since
     by default we report "bsd" style df which doesn't count filesystem
     "overhead" blocks as used.

     With a lot of code dedicated to sorting out what to report as
     free, things tend to go wrong surprisingly often.

     Here's a test to actually try to stop the next regression.  ;)

     NB: For bsddf, the kernel currently does not count journal blocks
     as overhead; it probably should.  But the test below looks to have
     the result within 1% of perfection, so it still passes even if
     the kernel doesn't count the journal against free blocks.

Eric,

This patch has been committed to git://oss.sgi.com/xfs/cmds/xfstests, 
master branch, commit 0b2ab695.

Thanks
--Rich



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  reply	other threads:[~2012-10-29 14:10 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-25 17:19 [PATCH] xfstests: test ext4 statfs Eric Sandeen
2012-10-25 17:19 ` Eric Sandeen
2012-10-26 18:03 ` Rich Johnston
2012-10-26 18:03   ` Rich Johnston
2012-10-26 18:39   ` Eric Sandeen
2012-10-26 18:39     ` Eric Sandeen
2012-10-29 13:28     ` Rich Johnston
2012-10-29 13:28       ` Rich Johnston
2012-10-29 14:12       ` Rich Johnston [this message]
2012-10-29 14:12         ` Rich Johnston

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