Re: [BUG] kernel 2.6.15.4: soft lockup detected on CPU#0!

[Andrew Morton <akpm@osdl.org>]

Charles-Edouard Ruault <ce@ruault.com> wrote:
>
> i was trying to rip a CD when the whole machine started to freeze
>  periodicaly, i then looked at the logs and found the following :
> 
>  Feb 12 19:23:39 ruault kernel: hdc: irq timeout: status=0x80 { Busy }
>  Feb 12 19:23:39 ruault kernel: ide: failed opcode was: unknown
>  Feb 12 19:23:39 ruault kernel: hdd: status timeout: status=0x80 { Busy }
>  Feb 12 19:23:39 ruault kernel: ide: failed opcode was: unknown
>  Feb 12 19:23:39 ruault kernel: hdd: drive not ready for command

No idea what caused that.

>  Feb 12 19:23:39 ruault kernel: BUG: soft lockup detected on CPU#0!

The following was merged today.  Hopefully it suppresses this false
positive.

--- devel/drivers/ide/ide-taskfile.c~ide-touch-softlockup-detector-during-pio	2006-02-15 14:57:05.000000000 -0800
+++ devel-akpm/drivers/ide/ide-taskfile.c	2006-02-15 14:57:05.000000000 -0800
@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/timer.h>
 #include <linux/mm.h>
+#include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/major.h>
 #include <linux/errno.h>
@@ -314,6 +315,8 @@ static void ide_pio_datablock(ide_drive_
 	if (rq->bio)	/* fs request */
 		rq->errors = 0;
 
+	touch_softlockup_watchdog();
+
 	switch (drive->hwif->data_phase) {
 	case TASKFILE_MULTI_IN:
 	case TASKFILE_MULTI_OUT:
_

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