Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: soft lockup detected in acpi_processor_idle() -- false positive? | Date | Fri, 13 Jan 2006 12:17:04 +0100 |
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On Friday, 13 January 2006 01:55, Shaohua Li wrote: > On Thu, 2006-01-12 at 20:54 +0100, Rafael J. Wysocki wrote: > > On Thursday, 12 January 2006 19:43, Dominik Brodowski wrote: > > > Latest git, fresh after resuming from suspend-to-disk (in-kernel variant): > > > > > > [4294914.586000] Restarting tasks... done > > > [4294922.657000] BUG: soft lockup detected on CPU#0! > > > [4294922.657000] > > > [4294922.657000] Pid: 0, comm: swapper > > > [4294922.657000] EIP: 0060:[<f003084c>] CPU: 0 > > > [4294922.657000] EIP is at acpi_processor_idle+0x1f3/0x2d5 [processor] > > > [4294922.657000] EFLAGS: 00000282 Not tainted (2.6.15) > > > [4294922.657000] EAX: fffff000 EBX: 005543a8 ECX: 00000000 EDX: 00000000 > > > [4294922.657000] ESI: edcc3064 EDI: edcc2f60 EBP: c041cfdc DS: 007b ES: 007b > > > [4294922.657000] CR0: 8005003b CR2: 080c3000 CR3: 2d530000 CR4: 000006d0 > > > > > > > > > As acpi_processor_idle doesn't take any locks AFAIK, it seems to me to be a > > > false positive -- or do I miss something obvious? > > > > I think it's a false-positive. > > > > This "soft lockup" message has been appearing for me for quite some time now > > (actually since the softlockup patch made it into -mm ;-)), in a > > non-reproducible manner, but I haven't been able to nail it down. > > > > Still, I thought it was x86-64-specific, but your machine is an i386, > > so there's more to it, apparently. Probably there's missing > > touch_softlockup_watchdog() somewhere, or the timer .suspend()/.resume() > > routines need some additional review. > I got some similar reports for S3: > http://bugzilla.kernel.org/show_bug.cgi?id=5825 > I guess x86-64 lacks .suspend/.resume for timer.
No, it doesn't. They are similar to i386 ones.
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