ngompa/kernel-rpm
1
0
Fork 0
forked from rpms/kernel
Code Pull Requests Activity

Make the irqpoll patch less chatty (rhbz 800520)

Browse Source 
Should look at making the frequency of checking dynamic, but this will help
the immediate problem.
This commit is contained in:
Josh Boyer 2012-03-12 14:58:06 -04:00
parent 04412e0aef
commit 25313f2bcf
1 changed files with 17 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
unhandled-irqs-switch-to-polling.patch
View File

@ -140,12 +140,12 @@ every time during debugging).
Signed-off-by: Jeroen Van den Keybus <jeroen.vandenkeybus@gmail.com> Signed-off-by: Jeroen Van den Keybus <jeroen.vandenkeybus@gmail.com>
Make it less chatty. Josh Boyer <jwboyer@redhat.com>
====== ======
diff -up linux-3.2-rc4.orig/kernel/irq/spurious.c --- linux-2.6.orig/kernel/irq/spurious.c
linux-3.2-rc4/kernel/irq/spurious.c +++ linux-2.6/kernel/irq/spurious.c
--- linux-3.2-rc4.orig/kernel/irq/spurious.c 2011-12-01 23:56:01.000000000 +0100
+++ linux-3.2-rc4/kernel/irq/spurious.c 2011-12-11 16:14:48.188377387 +0100
@@ -18,7 +18,7 @@ @@ -18,7 +18,7 @@
static int irqfixup __read_mostly; static int irqfixup __read_mostly;
@ -173,30 +173,25 @@ linux-3.2-rc4/kernel/irq/spurious.c
if (!i) if (!i)
continue; continue;
@@ -158,15 +159,33 @@ static void poll_spurious_irqs(unsigned @@ -159,14 +160,29 @@ static void poll_spurious_irqs(unsigned
barrier();
if (!(state & IRQS_SPURIOUS_DISABLED)) if (!(state & IRQS_SPURIOUS_DISABLED))
continue; continue;
-
- local_irq_disable(); - local_irq_disable();
- try_one_irq(i, desc, true); - try_one_irq(i, desc, true);
- local_irq_enable(); - local_irq_enable();
+
+ /* We end up here with a disabled spurious interrupt. + /* We end up here with a disabled spurious interrupt.
+ desc->irqs_unhandled now tracks the number of times + desc->irqs_unhandled now tracks the number of times
+ the interrupt has been polled */ + the interrupt has been polled */
+ +
+ irq = desc->irq_data.irq; + irq = desc->irq_data.irq;
+ if (desc->irqs_unhandled < 100) { /* 1 second delay with poll frequency 100 Hz */ + if (desc->irqs_unhandled < 100) { /* 1 second delay with poll frequency 100 Hz */
+ if (desc->irqs_unhandled == 0)
+ printk("Polling IRQ %d\n", irq);
+ local_irq_disable(); + local_irq_disable();
+ try_one_irq(i, desc, true); + try_one_irq(i, desc, true);
+ local_irq_enable(); + local_irq_enable();
+ desc->irqs_unhandled++; + desc->irqs_unhandled++;
+ poll_again = 1; + poll_again = 1;
+ } else { + } else {
+ printk("Reenabling IRQ %d\n", irq);
+ irq_enable(desc); /* Reenable the interrupt line */ + irq_enable(desc); /* Reenable the interrupt line */
+ desc->depth--; + desc->depth--;
+ desc->istate &= (~IRQS_SPURIOUS_DISABLED); + desc->istate &= (~IRQS_SPURIOUS_DISABLED);
@ -213,7 +208,7 @@ linux-3.2-rc4/kernel/irq/spurious.c
} }
static inline int bad_action_ret(irqreturn_t action_ret) static inline int bad_action_ret(irqreturn_t action_ret)
@@ -177,11 +196,19 @@ static inline int bad_action_ret(irqretu @@ -177,11 +193,19 @@ static inline int bad_action_ret(irqretu
} }
/* /*
@ -235,7 +230,7 @@ linux-3.2-rc4/kernel/irq/spurious.c
* functioning device sharing an IRQ with the failing one) * functioning device sharing an IRQ with the failing one)
*/ */
static void static void
@@ -302,19 +329,19 @@ void note_interrupt(unsigned int irq, st @@ -302,19 +326,19 @@ void note_interrupt(unsigned int irq, st
} }
desc->irq_count++; desc->irq_count++;
@ -259,11 +254,3 @@ linux-3.2-rc4/kernel/irq/spurious.c
desc->istate |= IRQS_SPURIOUS_DISABLED; desc->istate |= IRQS_SPURIOUS_DISABLED;
desc->depth++; desc->depth++;
irq_disable(desc); irq_disable(desc);
======
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/