From: Andrew Morton <akpm@zip.com.au>
To: Helge Hafting <helgehaf@aitel.hist.no>
Cc: linux-kernel@vger.kernel.org, neilb@cse.unsw.edu.au, davej@suse.de
Subject: Re: 2.5.24-dj1,smp,ext2,raid0: I got random zero blocks in my files.
Date: Mon, 01 Jul 2002 01:18:20 -0700 [thread overview]
Message-ID: <3D20104C.BF156E78@zip.com.au> (raw)
In-Reply-To: 3D200BF6.3A6D9B59@aitel.hist.no
Helge Hafting wrote:
>
> 2.5.24-dj1 gave me files with zeroed blocks inside.
> What I did: I untarred the source for lyx 1.2.0
> and tried to compile it, several times.
>
> gcc and make choked on occational blocks of zeroes
> inside files, different places each time.
> Going back to 2.5.18 fixed it.
>
> This isn't all that surprising considering that
> the raid driver logs complaints about requests
> bigger than 32k, which is the stripe size.
> I believed this worked by retrying with much smaller
> requests, perhaps I am wrong?
>
> The filesystems use 4k blocks.
> I haven't seen any trouble on non-raid or raid-1
> partitions.
Yes, the large BIO stuff went into 2.5.19. RAID0 doesn't
like those big BIOs. Jens is cooking up a fix for that.
Just to confirm that this is the problem, could you please
set MPAGE_BIO_MAX_SIZE in 32768 in fs/mpage.c and see if the
failure goes away?
-
next prev parent reply other threads:[~2002-07-01 8:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-01 7:59 2.5.24-dj1,smp,ext2,raid0: I got random zero blocks in my files Helge Hafting
2002-07-01 8:18 ` Andrew Morton [this message]
2002-07-04 0:34 ` Neil Brown
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