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Date: Tue, 13 Jul 2010 14:23:58 +0200 From: Johannes Hirte <johannes.hirte@....tu-ilmenau.de> To: Chris Mason <chris.mason@...cle.com> Cc: linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org Subject: Re: kernel BUG at fs/btrfs/extent-tree.c:1353 Am Sonntag 11 Juli 2010, 14:28:09 schrieb Johannes Hirte: ... > I've three systems running with btrfs, a dual Opteron (252), a Pentium 4 > system and a netbook with N270 Atom. The netbook is the only one that shows > the errors. It's also the only system where I'm using gcc-4.5. Perhaps it's > related, but I doubt it's the only reason as I'm using gcc-4.5 since May. On the Opteron system I got now csum errors. I've synced some data from the netbook to the Opteron yesteray. After hitting ENOSPC with 4GB free, I've run 'btrfs-vol -b' on this fs in hope to get some more free space. It worked but the command failed and I found in dmesg: btrfs csum failed ino 339 off 935280640 csum 337776576 private 337776575 btrfs csum failed ino 339 off 935280640 csum 337776576 private 337776575 btrfs csum failed ino 339 off 935280640 csum 337776576 private 337776575 btrfs csum failed ino 339 off 935280640 csum 337776576 private 337776575 So I've tested the new synced data by syncing them to another disk on the Optoern system (XFS). As I've expected (or better feared), some data wasn't readable and I found more csum errors in dmesg: btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1849137 off 368640 csum 3354885689 private 3354885688 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1912210 off 5095424 csum 847944548 private 847944547 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 252362752 csum 686735346 private 686735345 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 651108352 csum 2851505977 private 2851505976 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 btrfs csum failed ino 1959333 off 898342912 csum 4271223884 private 4271223883 I suspect something goes horribly wrong on writing to disc within btrfs. On the netbook I got missing blocks, on the Opteron System bad csums. Both systems are running linux-2.6.35-rc4, the netbook with gcc-4.5.0 the Opteron system with gcc-4.4.4. I'll test the P4 system later, if there are similar errors too. regards, Johannes -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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