From: =?ISO-8859-1?Q?P=E1draig_Brady?=
Subject: Re: Files full of zeros with coreutils-8.11 and xfs (FIEMAP related?)
Date: Thu, 14 Apr 2011 20:13:53 +0100
Message-ID: <4DA74771.5010103@draigBrady.com>
References: <20110414102608.GA1678@x4.trippels.de> <20110414120635.GB1678@x4.trippels.de> <20110414140222.GB1679@x4.trippels.de> <4DA70BD3.1070409@draigBrady.com> <4DA717B2.3020305@sandeen.net> <4DA7182B.8050409@draigBrady.com> <878vvcspz0.fsf@rho.meyering.net>
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Cc: Eric Sandeen , linux-ext4@vger.kernel.org,
coreutils@gnu.org, Markus Trippelsdorf ,
xfs-oss
To: Jim Meyering
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On 14/04/11 18:27, Jim Meyering wrote:
>=20
> 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:
>=20
> + df -t ext3 .
Not with ext3 ...
> + mkfs -t ext4 -F blob
=2E.. but with ext4 loop back
> + perl -e 'BEGIN { $n =3D 1 * 1024; *F =3D *STDOUT }' -e 'for (1..1=
) { sysseek (*F, $n, 1)' -e '&& syswrite (*F, chr($_)x$n) or die "$!"}'
> + cp --sparse=3Dalways j1 j2
> + cmp j1 j2
> j1 j2 differ: char 1, line 1 <<<<=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
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,
P=E1draig.
p.s. I will do some checking with ext3 to ensure everything is OK
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