Re: Linux v2.4.19-rc5

Andrew Morton (akpm@zip.com.au)
Thu, 01 Aug 2002 11:57:25 -0700


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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