From: Anthony Liguori <aliguori@us.ibm.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: qemu-devel@nongnu.org, Paul Brook <paul@codesourcery.com>
Subject: [Qemu-devel] Re: LSI SCSI: raise UDC on infinite loop
Date: Mon, 22 Sep 2008 11:15:20 -0500 [thread overview]
Message-ID: <48D7C498.4040802@us.ibm.com> (raw)
In-Reply-To: <20080922154927.GA15498@dmt.cnet>
Marcelo Tosatti wrote:
> (resending with Signed-off-by)
>
> -----
>
> Raise UDC (Unexpected Disconnect) when a large enough number of
> instructions has been executed by the SCRIPTS processor. This "solution"
> is much simpler than temporarily interrupting execution.
>
> This remedies the situation with Windows which downloads SCRIPTS code
> that busy loops on guest main memory. Their drivers _do_ handle UDC
> appropriately (at least XP and 2003).
>
> It would be nicer to actually detect infinite loops, but until then,
> this bandaid seems acceptable.
>
> Since the situation seems to be rare enough, raise the number
> of instructions to 10000 (previously 1000).
>
> Three people other than myself had success with this patch.
>
> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
>
>
Applied. Thanks.
Regards,
Anthony Liguori
prev parent reply other threads:[~2008-09-22 16:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-22 15:49 [Qemu-devel] LSI SCSI: raise UDC on infinite loop Marcelo Tosatti
2008-09-22 16:15 ` Anthony Liguori [this message]
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