Sophie: kernel-2.6.18-128.1.10.el5 src

kernel-2.6.18-128.1.10.el5.src.rpm

From: Brad Peters <bpeters@redhat.com>
Date: Thu, 28 Feb 2008 14:18:31 -0500
Subject: [ppc64] fix xics set_affinity code
Message-id: 47C70907.5020605@redhat.com
O-Subject: [RHEL 5.2 Patch 1/1] Fixes 'xics_set_affinity: No online cpus in the mask' problem
Bugzilla: 435126

RHBZ#:
------
https://bugzilla.redhat.com/show_bug.cgi?id=435126

Description:
------------
RHEL 5.2 on Power continuously throws the following error messages to console:

Feb 25 11:14:17 squad1-lp3 kernel: xics_set_affinity: No online cpus in the mask
00000000,00000000,00000000,00000001 for irq 18
Feb 25 11:14:17 squad1-lp3 kernel: xics_set_affinity: No online cpus in the mask
00000000,00000000,00000000,00000001 for irq 19

These errors are highly visible to power users, and this really needs to get fixed for 5.2.

This patch fixes the problem by passing the virtual irq into get_irq_server(), rather than the real irq.

RHEL Version Found:
------------------
RHEL 5.1 Beta

kABI Status:
------------
No symbols were harmed.

Brew:
-----
Built on all platforms.
http://brewweb.devel.redhat.com/brew/taskinfo?taskID=1190888

Kernel binary rpm available at:
-----
http://people.redhat.com/bpeters/kernels/5.2/kernel-2.6.18-83.el5.83.el5.435126.ppc64.rpm

Upstream Status:
----------------
Upstream at
Commit # e48395f1753cab0fde6c03f1db833cece9ef2ba0

Test Status:
------------
Tested, fix confirmed.  2/28/08 <bpeters@redhat.com>

---------------------------------------------------------------

Brad Peters 1-978-392-1000 x 23183
IBM on-site partner.

Proposed Patch:
---------------
This patch is based on 2.6.18-83.el5

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<pre>RHBZ#:
------
<a class="moz-txt-link-freetext" href="https://bugzilla.redhat.com/show_bug.cgi?id=435126">https://bugzilla.redhat.com/show_bug.cgi?id=435126</a>

Description:
------------
RHEL 5.2 on Power continuously throws the following error messages to console:

Feb 25 11:14:17 squad1-lp3 kernel: xics_set_affinity: No online cpus in the mask
00000000,00000000,00000000,00000001 for irq 18
Feb 25 11:14:17 squad1-lp3 kernel: xics_set_affinity: No online cpus in the mask
00000000,00000000,00000000,00000001 for irq 19

These errors are highly visible to power users, and this really needs to get fixed for 5.2.

This patch fixes the problem by passing the virtual irq into get_irq_server(), rather than the real irq.

RHEL Version Found:
------------------
RHEL 5.1 Beta

kABI Status:
------------
No symbols were harmed.

Brew:
-----
Built on all platforms.
<a class="moz-txt-link-freetext" href="http://brewweb.devel.redhat.com/brew/taskinfo?taskID=1190888">http://brewweb.devel.redhat.com/brew/taskinfo?taskID=1190888</a>

Kernel binary rpm available at:
-----
<a class="moz-txt-link-freetext" href="http://people.redhat.com/bpeters/kernels/5.2/kernel-2.6.18-83.el5.83.el5.435126.ppc64.rpm">http://people.redhat.com/bpeters/kernels/5.2/kernel-2.6.18-83.el5.83.el5.435126.ppc64.rpm</a>

Upstream Status:
----------------
Upstream at
Commit # e48395f1753cab0fde6c03f1db833cece9ef2ba0

Test Status:
------------
Tested, fix confirmed.  2/28/08 <a class="moz-txt-link-rfc2396E" href="mailto:bpeters@redhat.com">&lt;bpeters@redhat.com&gt;</a>

---------------------------------------------------------------

Brad Peters 1-978-392-1000 x 23183
IBM on-site partner.

Proposed Patch:
---------------
This patch is based on 2.6.18-83.el5

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diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index a1e133e..a011fe4 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -440,7 +440,7 @@ static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
 	 * For the moment only implement delivery to all cpus or one cpu.
 	 * Get current irq_server for the given irq
 	 */
-	irq_server = get_irq_server(irq, 1);
+	irq_server = get_irq_server(virq, 1);
 	if (irq_server == -1) {
 		char cpulist[128];
 		cpumask_scnprintf(cpulist, sizeof(cpulist), cpumask);