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Message-ID: <319012f0811051213g1f2ed31blf2b4bede3dd9535@mail.gmail.com> Date: Wed, 5 Nov 2008 21:13:30 +0100 From: Cryptooctoploid <cryptooctoploid@...il.com> To: "Theodore Tso" <tytso@....edu> Cc: "Roc Valles" <vallesroc@...il.com>, linux-ext4@...r.kernel.org Subject: Re: data corruption with ext4 (from 2.6.27.4) exposed by rtorrent On Wed, Nov 5, 2008 at 6:25 PM, Theodore Tso <tytso@....edu> wrote: > Cryptooctoploid, > > Based on some reflection and further discussion on #ext4, I have a > theory which we need to try to prove/disprove that it may be related > to memory pressure combined with the delayed allocation code. > > If you've already dismantled your ext4 setup, maybe you can't test > this, but it would be interesting to know mounting with the -o > nodelalloc makes the problem go away. Yes, -o nodelalloc resolves the issue here. >Also, how much memory do you > have in your system and is your system often under memory pressure? > (i.e., your system often uses swap, and where the amount of free > memory is often near the low water mark where it is trying to evict > memory either by dropping clean pages or writing dirty pages back to > the filesystem and/or swap). I have 2GB of memory and my machine is not under any kind of memory pressure normally. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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