Re: Linux v2.4.19-rc5

[Andrew Morton <akpm@zip.com.au>]

Steven Cole wrote:
> 
> ...
> I've never seen this on 2.4.19-rc3 and I've been beating on it pretty
> hard, running dbench 128 many times.  However, 2.5 is another story.
> 
> This might not be the best thread to report this, but since the subject
> came up, I'm getting the following message with recent 2.5.x kernels
> whenever I run relatively large numbers of dbench clients.
> 
> Buffer I/O error on device sd(8,8), logical block XXXXXXX
> 
> where logical block repeats 0-6 times.  This behavior is repeatable, but
> only occurs under fairly high load.  I ran dbench with increasing numbers
> of clients, with the following results:
> 
> dbench clients  Buffer I/O error messages
> >=48            0
> 52              1
> 56              0
> 64              0
> 80              11
> 96              9
> 112             7
> 128             4

Yup.  The printk is bogus - I thought I'd removed it a couple of
kernels ago.

It's a bit sad that an abandoned readahead attempt is indistinguishable
from a dead disk.

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