From: David H <davidh.davidh@gmail.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com, barryf-lists@flanagan.ie, rob@rsee.net
Subject: Re: 1850/2850 hangs under I/O load
Date: Wed, 13 Jul 2005 12:39:26 -0700 [thread overview]
Message-ID: <c4e0079f05071312395a82d7b4@mail.gmail.com> (raw)
In-Reply-To: <E1Dsja0-0004fn-00@mta1.cl.cam.ac.uk>
I have some supermicro systems with the same chipset/problem as the
1850/2850. This patch appears to fix the problem for me. I could
always hang the server by using scp to copy a large file. I have been
able to scp this file 10 times without a hang!! However, it looks
like we lose ACPI. Is that the expected outcome?
cat /proc/interrups before and after:
CPU0
1: 10 Phys-irq i8042
9: 0 Phys-irq acpi
12: 101 Phys-irq i8042
15: 4412096 Phys-irq ide1
16: 94555 Phys-irq uhci_hcd, uhci_hcd
18: 6161124 Phys-irq uhci_hcd
19: 0 Phys-irq uhci_hcd
48: 84003 Phys-irq 3w-xxxx
54: 3091939 Phys-irq eth0
256: 0 Dynamic-irq ctrl-if
257: 22704931 Dynamic-irq timer0
258: 0 Dynamic-irq console
259: 0 Dynamic-irq net-be-dbg
NMI: 0
LOC: 0
ERR: 0
MIS: 0
CPU0
1: 10 Phys-irq i8042
12: 101 Phys-irq i8042
15: 24398 Phys-irq ide1
16: 288202 Phys-irq uhci_hcd, uhci_hcd
18: 7522500 Phys-irq uhci_hcd
19: 0 Phys-irq uhci_hcd
48: 92704 Phys-irq 3w-xxxx
54: 7764230 Phys-irq eth0
128: 1 Dynamic-irq misdirect
129: 0 Dynamic-irq ctrl-if
130: 239113 Dynamic-irq timer
131: 0 Dynamic-irq console
132: 0 Dynamic-irq net-be-dbg
NMI: 0
ERR: 0
David
On 7/13/05, Keir Fraser <Keir.Fraser@cl.cam.ac.uk> wrote:
>
> Looking back over the emails on this topic, someone pointed out a
> patch for Linux 2.6.10 that disabled software IRQ affinity for
> 1850/2850 systems.
>
> You can try a similar fix on Xen (either 2.0.x or unstable) by editing
> arch/x86/irq.c:pirq_guest_bind(), and remove the following lines:
>
> if ( desc->handler->set_affinity != NULL )
> desc->handler->set_affinity(<blah>);
>
> If this fixes the I/O hangs for you, it is a nicer fix than
> ignorebiostables. I can add a boot parameter to have the same effect,
> and also probably have the fix applied automatically for 1850/2850
> systems in the unstable tree (just like Linux).
>
> Let me know how it works out.
>
> -- Keir
>
next prev parent reply other threads:[~2005-07-13 19:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-13 15:55 1850/2850 hangs under I/O load Keir Fraser
2005-07-13 16:43 ` Brian Hays
2005-07-13 17:16 ` Keir Fraser
2005-07-13 19:39 ` David H [this message]
[not found] ` <c4e0079f0507131213190d6762@mail.gmail.com>
[not found] ` <6e5c7f99544bb10aa8fe6663cfd8d79e@cl.cam.ac.uk>
2005-07-14 1:37 ` David H
2005-07-14 10:29 ` Keir Fraser
2005-07-14 10:45 ` Keir Fraser
2005-07-14 11:15 ` Keir Fraser
2005-07-14 15:05 ` David H
2005-07-14 15:14 ` Keir Fraser
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