Re: [SUGGESTION]: drop virtual merge accounting in I/O requests

From: Julian Calaby
Date: Thu Jul 10 2008 - 18:59:33 EST


On Fri, Jul 11, 2008 at 07:56, Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote:
> Hi
>
> I'm getting crashes with InitIO A100u2w controller on Sparc64 (I had to fix
> the endianity issues in the driver, but that's unrelated).
>
> When I examined the crashes, it turned out that SCSI layer passed requests
> with too many segments. The controller has at most 32 SG entries per
> request. It sets shost->sg_tablesize to 32, but despite this, larger
> requests were submitted to it --- this resulted in overwriting random memory
> and crashes.

[snip]

Should this have been CC'd to linux-scsi too? This sounds like it
could be a bug at their end.

Thanks,

--
Julian Calaby

Email: julian.calaby@xxxxxxxxx
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