linux-kernel - Re: 2.6.30-rc6: Reported regressions from 2.6.29

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Message-ID: <20090517161916.GA2976@liondog.tnic>
Date:	Sun, 17 May 2009 18:19:16 +0200
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Helge Deller <deller@....de>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Kyle McMartin <kyle@...artin.ca>
Subject: Re: 2.6.30-rc6: Reported regressions from 2.6.29

Hi,

On Sun, May 17, 2009 at 03:32:11PM +0200, Frederic Weisbecker wrote:
> On Sun, May 17, 2009 at 09:33:27AM +0200, Ingo Molnar wrote:
> > > Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13297
> > > Subject		: kernel panic -  not syncing : fatel exception in interupt
> > > Submitter	: rob <rob1@...setosell.net>
> > > Date		: 2009-05-12 19:34 (5 days old)
> > > References	: http://marc.info/?l=linux-kernel&m=124216126903309&w=4
> > 
> > tainted crash, but probably legit. It does show some badness in an 
> > old-IDE legacy codepath:
> > 
> > [<c0371865>] error_code+0x65/0x6c
> > [<c0110155>] do_page_fault+0x0/0x1e0
> > [<c027dafc>] ide_complete_rq+0xf/0x3b
> > [<c02870a0>] cdrom_newpc_intr+0x64d/0x6cd
> > [<c0286a53>] cdrom_newpc_intr+0x0/0x6cd
> > [<c027dcc2>] ide_intr+0x109/0x161
> > [<c0132298>] handle_IRQ_event+0x54/0xc7
> > [<c013354a>] handle_level_irq+0x4f/0x85
> > [<c0103df7>] handle_irq+0x17/0x20
> > [<c0103da5>] do_IRQ+0x2b/0x66
> > [<c0102be9>] common_interupt+0x29/0x30
> > [<c0480000>] cmd40x_init+0x2ac/0x38d
> > [<c0106db3>] default_idle+0x25/0x38
> > [<c01019be>] cpu_idle+0x19/0x2d
> > [<c0468907>] start_kernel+0x23f/0x242
> > 
> > report subject line is too unspecific, it should be changed to 
> > something like:
> > 
> >   legacy IDE cmd40x related bootup crash
> 
> 
> It seems the crash has been rewritten by hand. I don't see
> any cmd40x_init(), I guess it's about cmd640 chipset, then
> cmd640x_init()
> 
> I don't see very recent changes in drivers/ide/cmd640.c
> But there are some in drivers/ide/ide-io.c and drivers/ide/ide-cd.c
> for this cycle.
> 
> Especially commit a1f9a89c90b4ac143c5b6054c2a157572b272cd2 which
> fixed in -rc2:
> 
>  Kernel Fault: Code=26 regs=8ed34c40 (Addr=00000024)
>      IASQ: 00000000 00000000 IAOQ: 1034b5ac 1034b5b0
>      IIR: 4ab30048    ISR: 00000000  IOR: 00000024
>      CPU:        0   CR30: 8ed34000 CR31: ffff55ff
>      ORIG_R28: 00000000
>      IAOQ[0]: ide_complete_rq+0x2c/0x70
>      IAOQ[1]: ide_complete_rq+0x30/0x70
>      RP(r2): cdrom_newpc_intr+0x178/0x46c
>     Backtrace:
>      [<1035c608>] cdrom_newpc_intr+0x178/0x46c
>      [<1034c494>] ide_intr+0x1b0/0x214
>      [<1016d284>] handle_IRQ_event+0x70/0x150
>      [<1016d4b0>] __do_IRQ+0x14c/0x1cc
>      [<102f7864>] superio_interrupt+0x88/0xbc
>      [<1016d284>] handle_IRQ_event+0x70/0x150
>      [<1016d4b0>] __do_IRQ+0x14c/0x1cc
>      [<10112efc>] do_cpu_irq_mask+0x9c/0xd0
>      [<10116068>] intr_return+0x0/0x4
> 
> Looks very similar. But the crash reported in this ticket is for -rc4, which means the
> issue was still there after this fix or it's another one.
> Adding some more Cc's.

yep, I'm already looking into it.

-- 
Regards/Gruss,
    Boris.
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