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Re: [Xen-users] Xen 4.0.1 and megaraid_sas causes I/O to hang (xen-4 + m

To: Stephan Austermühle <au@xxxxxxx>
Subject: Re: [Xen-users] Xen 4.0.1 and megaraid_sas causes I/O to hang (xen-4 + megasas(DELL 6i RAID) = Reject I/O to offline device)
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Sun, 7 Nov 2010 23:38:51 +0200
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On Sun, Oct 17, 2010 at 12:02:35PM +0200, Stephan Austermühle wrote:
> Hello again,
> Am 12.10.2010 14:43, schrieb Stephan Austermühle:
> > Looks like I have not found a permanent solution. Any comments about the
> > attached messages?
> Latest news with this issue:
> Updated to Debian kernel 2.6.32-24 that fixes two issues: domU's network
> activity stops randomly ("netfront smartpoll bugfix") and a lost
> interrupt issue ("Fix lost interrupt race in Xen event channels"):
>       http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=596635
>       http://kerneltrap.org/mailarchive/linux-kernel/2010/8/24/4610615
> By the way the kernel update reverted the megaraid_sas driver back to 4.01.
> Anyway, this doesn't seem to help. Today the server freezed again. This
> time without any visible error message---so I don't know if it was a
> problem with the megaraid_sas driver. In contrast to the previous hangs
> or freezes it's not just the I/O that went offline but the entire system.
> Let me know if you have any ideas on this issue. Otherwise I will
> continue my monologue just in case anybody else faces the same issue.

I just noticed today the default megaraid_sas driver in upstream Linux 
fails to boot (doesn't detect disks).

I fixed the problem by updating the driver to version 4.33. 
Maybe that helps? 

It's available at least here:

on comment #16 as an attachment.

-- Pasi

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