rpms
/
kernel
2
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Fixup irqpoll patch to only activate on machines with ASM108x PCI bridge

This commit is contained in:
Josh Boyer 2012-03-14 20:29:41 -04:00
parent 13fb067e91
commit 953a16a7c0
2 changed files with 65 additions and 87 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
kernel.spec
View File

@ -54,7 +54,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 1
%global baserelease 2
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -2386,6 +2386,9 @@ fi
# and build.
%changelog
* Wed Mar 14 2012 Josh Boyer <jwboyer@redhat.com>
- Fixup irqpoll patch to only activate on machines with ASM108x PCI bridge
* Wed Mar 14 2012 Steve Dickson <steved@redhat.com>
- Reduce the foot print of the NFSv4 idmapping coda (bz 593035)
@ -2398,7 +2401,7 @@ fi
* Wed Mar 07 2012 Dave Jones <davej@redhat.com>
- Add debug patch for bugs 787171/766277
* Wed Mar 07 2012 Josh Boye <jwboyer@redhat.com>
* Wed Mar 07 2012 Josh Boyer <jwboyer@redhat.com>
- CVE-2012-1146: memcg: unregister events attached to the same eventfd can
oops (rhbz 800817)

145
unhandled-irqs-switch-to-polling.patch
View File

@ -1,62 +1,3 @@
From davej Mon Jan 30 16:40:11 2012
Return-Path: linux-kernel-owner@vger.kernel.org
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on
gelk.kernelslacker.org
X-Spam-Level:
X-Spam-Status: No, score=-4.9 required=5.0 tests=DKIM_ADSP_CUSTOM_MED,
DKIM_SIGNED,FREEMAIL_FROM,RCVD_IN_DNSWL_HI,T_DKIM_INVALID,T_RP_MATCHES_RCVD,
T_TO_NO_BRKTS_FREEMAIL,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.2
Received: from mail.corp.redhat.com [10.5.5.52]
by gelk.kernelslacker.org with IMAP (fetchmail-6.3.20)
for <davej@localhost> (single-drop); Mon, 30 Jan 2012 16:40:11 -0500 (EST)
Received: from zmta01.collab.prod.int.phx2.redhat.com (LHLO
zmta01.collab.prod.int.phx2.redhat.com) (10.5.5.31) by
zmail11.collab.prod.int.phx2.redhat.com with LMTP; Mon, 30 Jan 2012
16:37:45 -0500 (EST)
Received: from localhost (localhost.localdomain [127.0.0.1])
by zmta01.collab.prod.int.phx2.redhat.com (Postfix) with ESMTP id 4BAD0114054;
Mon, 30 Jan 2012 16:37:45 -0500 (EST)
X-Quarantine-ID: <1529X45BXJfc>
Authentication-Results: zmta01.collab.prod.int.phx2.redhat.com (amavisd-new);
dkim=softfail (fail, body has been altered) header.i=@gmail.com
Received: from zmta01.collab.prod.int.phx2.redhat.com ([127.0.0.1])
by localhost (zmta01.collab.prod.int.phx2.redhat.com [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id 1529X45BXJfc; Mon, 30 Jan 2012 16:37:45 -0500 (EST)
Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12])
by zmta01.collab.prod.int.phx2.redhat.com (Postfix) with ESMTP id 717AC11404F;
Mon, 30 Jan 2012 16:37:44 -0500 (EST)
Received: from mx1.redhat.com (ext-mx14.extmail.prod.ext.phx2.redhat.com [10.5.110.19])
by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id q0ULbhea005095;
Mon, 30 Jan 2012 16:37:43 -0500
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q0ULQIU9002068;
Mon, 30 Jan 2012 16:37:42 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
id S1753551Ab2A3Vha (ORCPT <rfc822;lcapitulino@redhat.com>
+ 52 others); Mon, 30 Jan 2012 16:37:30 -0500
Received: from mail-pz0-f46.google.com ([209.85.210.46]:44901 "EHLO
mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
with ESMTP id S1751932Ab2A3Vh2 (ORCPT
<rfc822;linux-kernel@vger.kernel.org>);
Mon, 30 Jan 2012 16:37:28 -0500
Received: by dadi2 with SMTP id i2so3911730dad.19
for <linux-kernel@vger.kernel.org>; Mon, 30 Jan 2012 13:37:28 -0800 (PST)
Received-SPF: pass (google.com: domain of jeroen.vandenkeybus@gmail.com designates 10.68.218.68 as permitted sender) client-ip=10.68.218.68;
Authentication-Results: mr.google.com; spf=pass (google.com: domain of jeroen.vandenkeybus@gmail.com designates 10.68.218.68 as permitted sender) smtp.mail=jeroen.vandenkeybus@gmail.com; dkim=pass header.i=jeroen.vandenkeybus@gmail.com
Received: from mr.google.com ([10.68.218.68])
by 10.68.218.68 with SMTP id pe4mr25063612pbc.97.1327959448228 (num_hops = 1);
Mon, 30 Jan 2012 13:37:28 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
d=gmail.com; s=gamma;
h=mime-version:date:message-id:subject:from:to:cc:content-type;
bh=acUEKJRLazlNr7PWqoJIHm/MPkfhI5SUq1Z0ntfqXSE=;
b=J1hmytKDfluL7NI73mVH+flbQ2+36FPRRx+DFhrPs8hiOebxJHysZZH+etW1ppCJG0
ORowrKZYuyXb1CVYkSAYSnZ60r0edu8VycE4wsVItKQV8f0ZFyFZi5HteL1KiBRHqTYI
soeRaI/zW4cJv3AbTTc1Aj/4/HXKyuPtj0Ayc=
MIME-Version: 1.0
Received: by 10.68.218.68 with SMTP id pe4mr20868027pbc.97.1327959448085; Mon,
30 Jan 2012 13:37:28 -0800 (PST)
Received: by 10.143.38.11 with HTTP; Mon, 30 Jan 2012 13:37:28 -0800 (PST)
Date: Mon, 30 Jan 2012 22:37:28 +0100
Message-ID: <CAPRPZsAt+e3cy1YTriikpb2SNN=jOusvnPF0ByFeun+uaBa5Og@mail.gmail.com>
Subject: [PATCH] Unhandled IRQs on AMD E-450: temporarily switch to
@ -141,21 +82,23 @@ every time during debugging).
Signed-off-by: Jeroen Van den Keybus <jeroen.vandenkeybus@gmail.com>
Make it less chatty. Josh Boyer <jwboyer@redhat.com>
Make it less chatty. Only kick it in if we detect an ASM1083 PCI bridge.
Josh Boyer <jwboyer@redhat.com>
======
--- linux-2.6.orig/kernel/irq/spurious.c
+++ linux-2.6/kernel/irq/spurious.c
@@ -18,7 +18,7 @@
@@ -18,6 +18,8 @@
static int irqfixup __read_mostly;
-#define POLL_SPURIOUS_IRQ_INTERVAL (HZ/10)
+#define POLL_SPURIOUS_IRQ_INTERVAL (HZ/100)
+int irq_poll_and_retry = 0;
+
#define POLL_SPURIOUS_IRQ_INTERVAL (HZ/10)
static void poll_spurious_irqs(unsigned long dummy);
static DEFINE_TIMER(poll_spurious_irq_timer, poll_spurious_irqs, 0, 0);
static int irq_poll_cpu;
@@ -141,14 +141,15 @@ out:
@@ -141,12 +143,13 @@ out:
static void poll_spurious_irqs(unsigned long dummy)
{
struct irq_desc *desc;
@ -168,12 +111,9 @@ Make it less chatty. Josh Boyer <jwboyer@redhat.com>
+ poll_again = 0; /* Will stay false as long as no polling candidate is found */
for_each_irq_desc(i, desc) {
- unsigned int state;
+ unsigned int state, irq;
unsigned int state;
if (!i)
continue;
@@ -159,14 +160,29 @@ static void poll_spurious_irqs(unsigned
@@ -159,14 +162,33 @@ static void poll_spurious_irqs(unsigned
if (!(state & IRQS_SPURIOUS_DISABLED))
continue;
@ -183,19 +123,23 @@ Make it less chatty. Josh Boyer <jwboyer@redhat.com>
+ /* We end up here with a disabled spurious interrupt.
+ desc->irqs_unhandled now tracks the number of times
+ the interrupt has been polled */
+
+ irq = desc->irq_data.irq;
+ if (desc->irqs_unhandled < 100) { /* 1 second delay with poll frequency 100 Hz */
+ if (irq_poll_and_retry) {
+ if (desc->irqs_unhandled < 100) { /* 1 second delay with poll frequency 100 Hz */
+ local_irq_disable();
+ try_one_irq(i, desc, true);
+ local_irq_enable();
+ desc->irqs_unhandled++;
+ poll_again = 1;
+ } else {
+ irq_enable(desc); /* Reenable the interrupt line */
+ desc->depth--;
+ desc->istate &= (~IRQS_SPURIOUS_DISABLED);
+ desc->irqs_unhandled = 0;
+ }
+ } else {
+ local_irq_disable();
+ try_one_irq(i, desc, true);
+ local_irq_enable();
+ desc->irqs_unhandled++;
+ poll_again = 1;
+ } else {
+ irq_enable(desc); /* Reenable the interrupt line */
+ desc->depth--;
+ desc->istate &= (~IRQS_SPURIOUS_DISABLED);
+ desc->irqs_unhandled = 0;
+ }
}
+ if (poll_again)
@ -208,7 +152,7 @@ Make it less chatty. Josh Boyer <jwboyer@redhat.com>
}
static inline int bad_action_ret(irqreturn_t action_ret)
@@ -177,11 +193,19 @@ static inline int bad_action_ret(irqretu
@@ -177,11 +199,19 @@ static inline int bad_action_ret(irqretu
}
/*
@ -230,7 +174,7 @@ Make it less chatty. Josh Boyer <jwboyer@redhat.com>
* functioning device sharing an IRQ with the failing one)
*/
static void
@@ -302,19 +326,19 @@ void note_interrupt(unsigned int irq, st
@@ -302,19 +332,24 @@ void note_interrupt(unsigned int irq, st
}
desc->irq_count++;
@ -242,15 +186,46 @@ Make it less chatty. Josh Boyer <jwboyer@redhat.com>
- if (unlikely(desc->irqs_unhandled > 99900)) {
+ if (unlikely(desc->irqs_unhandled >= 9)) {
/*
* The interrupt is stuck
- * The interrupt is stuck
+ * The interrupt might be stuck
*/
- __report_bad_irq(irq, desc, action_ret);
+ /* __report_bad_irq(irq, desc, action_ret); */
+ if (!irq_poll_and_retry) {
+ __report_bad_irq(irq, desc, action_ret);
+ printk(KERN_EMERG "Disabling IRQ %d\n", irq);
+ } else {
+ printk(KERN_INFO "IRQ %d might be stuck. Polling\n",
+ irq);
+ }
/*
* Now kill the IRQ
*/
- printk(KERN_EMERG "Disabling IRQ #%d\n", irq);
+ printk(KERN_EMERG "Disabling IRQ %d\n", irq);
desc->istate |= IRQS_SPURIOUS_DISABLED;
desc->depth++;
irq_disable(desc);
--- linux-2.6.orig/drivers/pci/quirks.c
+++ linux-2.6/drivers/pci/quirks.c
@@ -1677,6 +1677,22 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);
+/* ASM108x transparent PCI bridges apparently have broken IRQ deassert
+ * handling. This causes interrupts to get "stuck" and eventually disabled.
+ * However, the interrupts are often shared and disabling them is fairly bad.
+ * It's been somewhat successful to switch to polling mode and retry after
+ * a bit, so let's do that.
+ */
+extern int irq_poll_and_retry;
+static void quirk_asm108x_poll_interrupts(struct pci_dev *dev)
+{
+ dev_info(&dev->dev, "Buggy bridge found [%04x:%04x]\n",
+ dev->vendor, dev->device);
+ dev_info(&dev->dev, "Stuck interrupts will be polled and retried\n");
+ irq_poll_and_retry = 1;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ASMEDIA, 0x1080, quirk_asm108x_poll_interrupts);
+
#ifdef CONFIG_X86_IO_APIC
/*
* Boot interrupts on some chipsets cannot be turned off. For these chipsets,