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From: "Pádraig Brady" <P@draigBrady.com>
To: Jim Meyering <jim@meyering.net>
Cc: linux-ext4@vger.kernel.org, Eric Sandeen <sandeen@sandeen.net>,
	coreutils@gnu.org, Markus Trippelsdorf <markus@trippelsdorf.de>,
	xfs-oss <xfs@oss.sgi.com>
Subject: Re: Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?)
Date: Thu, 14 Apr 2011 20:13:53 +0100	[thread overview]
Message-ID: <4DA74771.5010103@draigBrady.com> (raw)
In-Reply-To: <878vvcspz0.fsf@rho.meyering.net>

On 14/04/11 18:27, Jim Meyering wrote:
> 
> FYI, I see the same failure now using ext3 (and but not w/ext4)
> with rawhide's 2.6.39-0.rc2.git0.0.fc16.x86_64:
> 
>   + df -t ext3 .

Not with ext3 ...

>   + mkfs -t ext4 -F blob

... but with ext4 loop back

>   + perl -e 'BEGIN { $n = 1 * 1024; *F = *STDOUT }' -e 'for (1..1) { sysseek (*F, $n, 1)' -e '&& syswrite (*F, chr($_)x$n) or die "$!"}'

>   + cp --sparse=always j1 j2
>   + cmp j1 j2
>   j1 j2 differ: char 1, line 1     <<<<================

But there was no preallocation done above.
So this was the original sync issue, which doesn't seem to be working :(
Is there a chance the rawhide kernel hasn't included that change?
Unlikely as it's 2.6.39-rc2.

cheers,
Pádraig.

p.s. I will do some checking with ext3 to ensure everything is OK

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  reply	other threads:[~2011-04-14 19:12 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-14 10:26 Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?) Markus Trippelsdorf
2011-04-14 12:06 ` Markus Trippelsdorf
2011-04-14 14:02   ` Markus Trippelsdorf
2011-04-14 14:59     ` Pádraig Brady
2011-04-14 15:50       ` Eric Sandeen
2011-04-14 15:52         ` Pádraig Brady
2011-04-14 15:56           ` Eric Sandeen
2011-04-14 16:03             ` Markus Trippelsdorf
2011-04-14 16:14               ` Eric Sandeen
2011-04-14 16:21               ` Yongqiang Yang
2011-04-14 16:28                 ` Markus Trippelsdorf
2011-04-14 16:31                   ` Eric Sandeen
2011-04-14 16:48                     ` Markus Trippelsdorf
2011-04-14 16:49                       ` Eric Sandeen
2011-04-14 16:04             ` Yongqiang Yang
2011-04-14 16:10               ` Yongqiang Yang
2011-05-05 11:29                 ` Pádraig Brady
2011-05-05 11:47                   ` Yongqiang Yang
2011-04-14 17:27           ` Jim Meyering
2011-04-14 19:13             ` Pádraig Brady [this message]
2011-04-14 19:39             ` Jim Meyering
2011-04-14 22:59         ` Dave Chinner
2011-04-14 23:29           ` Pádraig Brady
2011-04-15  0:09             ` Dave Chinner
2011-04-15  5:01               ` Andreas Dilger
2011-04-16  0:50                 ` Dave Chinner
2011-04-16  5:11                   ` Andreas Dilger
2011-04-16 12:21                     ` Theodore Tso
2011-04-18  0:40                       ` Dave Chinner
2011-04-18  2:45                         ` Andreas Dilger
2011-04-19  1:58                           ` Yongqiang Yang
2011-04-19  2:59                             ` Ted Ts'o
2011-04-19  3:05                               ` Eric Sandeen
2011-04-21 20:12                                 ` Jim Meyering
2011-04-19  3:30                               ` Yongqiang Yang
2011-04-19  4:14                               ` Dave Chinner
2011-04-19  5:27                               ` Christoph Hellwig
2011-04-19  3:44                             ` Dave Chinner
2011-04-19  6:53                               ` Yongqiang Yang
2011-04-19  7:45                                 ` Dave Chinner
2011-04-19  8:11                                   ` Yongqiang Yang
2011-04-19 14:05                                     ` Eric Sandeen
2011-04-19 14:09                                   ` Ted Ts'o
2011-04-19 14:13                                     ` Eric Sandeen
2011-04-19 16:01                                       ` Ted Ts'o
2011-04-20  1:53                                         ` Yongqiang Yang
2011-04-20 15:21                                         ` Christoph Hellwig
2011-04-20 17:21                                           ` Ted Ts'o
2011-04-19 21:08                                     ` Dave Chinner
2011-04-20 15:29                                       ` Christoph Hellwig
2011-04-16  6:05                   ` Yongqiang Yang
2011-04-18  0:35                     ` Dave Chinner
2011-04-15  8:53               ` Jim Meyering
2011-04-15 17:16                 ` Christoph Hellwig
2011-04-15 17:24                   ` Eric Blake
2011-04-15 17:26                     ` Christoph Hellwig
2011-04-15 22:28                       ` Andreas Dilger
2011-04-16  0:25                         ` Dave Chinner
2011-04-14 14:39 ` Eric Sandeen
2011-04-20 14:39 ` Jim Meyering
2011-04-21 20:01   ` Jim Meyering

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