Re: [PATCH] NFS regression in 2.6.26?, "task blocked for more than 120 seconds"
- From: "Glauber Costa" <glommer@xxxxxxxxx>
- Date: Mon, 20 Oct 2008 11:15:56 -0200
On Mon, Oct 20, 2008 at 4:51 AM, Max Kellermann <mk@xxxxxxxxxx> wrote:
On 2008/10/17 16:33, Glauber Costa <glommer@xxxxxxxxxx> wrote:
That's probably something related to apic congestion.
Does the problem go away if the only thing you change is this:
@@ -891,11 +897,6 @@ do_rest:
store_NMI_vector(&nmi_high, &nmi_low);
smpboot_setup_warm_reset_vector(start_ip);
- /*
- * Be paranoid about clearing APIC errors.
- */
- apic_write(APIC_ESR, 0);
- apic_read(APIC_ESR);
}
Please let me know.
Hello Glauber,
I have rebooted the server with 2.6.27.1 + this patchlet an hour ago.
No problems since.
Hardware: Compaq P4 Xeon server, Broadcom CMIC-WS / CIOB-X2 board.
Tell me if you need more detailed information.
There's a patch in flight from cyrill that probably fixes your problem:
http://lkml.org/lkml/2008/9/15/93
The checks are obviously there for a reason, and we can't just wipe
them out unconditionally ;-) So can you check please that you are also
covered by the case provided?
On 2008/10/20 08:27, Ian Campbell <ijc@xxxxxxxxxxxxxx> wrote:
The issue I see still occurs well before those changesets. I have
seen it with v2.6.25 but v2.6.24 survived for 7 days without issue
(my threshold for a good kernel is 7 days, hence bisecting is a bit
slow...).
Hello Ian,
it seems we're hunting down different bugs after all. Too bad, I
hoped I could have solved your problem, too. Our machine has been
running well over the weekend with the patch I posted; with faulty
kernels, the problem would occur after a few minutes.
Max
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