linux-kernel - Re: BUG: 2.6.26-git8: spinlock lockup in c1e

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Date:	Tue, 29 Jul 2008 03:15:03 +0400
From:	Mikhail Kshevetskiy <mikhail.kshevetskiy@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: BUG: 2.6.26-git8: spinlock lockup in c1e_idle()

On Mon, 28 Jul 2008 16:39:45 +0200 (CEST)
Thomas Gleixner <tglx@...utronix.de> wrote:

> On Thu, 24 Jul 2008, Mikhail Kshevetskiy wrote:
> 
> > BUG: spinlock lockup on CPU#0, swapper/0, ffffffff805d7e60
> > Pid: 0, comm: swapper Not tainted 2.6.26-git8 #6
> > 
> > Call Trace:
> >  [<ffffffff803471f1>] _raw_spin_lock+0xdc/0x107
> >  [<ffffffff80480170>] _spin_lock+0x55/0x62
> >  [<ffffffff8025a303>] clockevents_notify+0x19/0x7a
> >  [<ffffffff80213d40>] c1e_idle+0xf8/0x113
> >  [<ffffffff80256770>] ? atomic_notifier_call_chain+0xf/0x11
> >  [<ffffffff8020b2a7>] cpu_idle+0x88/0xee
> >  [<ffffffff8046c392>] rest_init+0x86/0x8a
> >  [<ffffffff80624e01>] start_kernel+0x399/0x3a4
> >  [<ffffffff8062429f>] x86_64_start_reservations+0xa5/0xa9
> >  [<ffffffff806243af>] x86_64_start_kernel+0xe9/0xf8
> 
> Mikhail,
> 
> we merged a patch which might be fixing that problem after
> 2.6.26-git8. Can you give Linus latest a try please ?
> 
> Thanks,
> 
> 	tglx

This does not help. I try 2.6.26-git17 and the problem still exist.
Please do not trust to kernel timestamp in dmesg. In reality it takes
2-3 times more time before spinlock lockup will be detected.

Here is the summary of kernel parameters I tried:
1) noapictimer      -- boot ok, tickless disabled
2) nohpet           -- boot ok, (i suppose tickless disabled)
3) clocksource=tsc  -- the same as with "nohpet"
4) idle=halt        -- need to press buttons to boot
5) none of above    -- the kernel freeze after switch to high resolution
                       mode on CPU0 and detect spinlock lockup 5 minutes
                       later

View attachment "dmesg-2.6.26-git17" of type "text/plain" (42409 bytes)

Download attachment "config-2.6.26-git17" of type "application/octet-stream" (74189 bytes)