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Date: Tue, 22 Feb 2005 09:22:17 -0500
From: John M Flinchbaugh <john@hjsoft.com>
To: acpi-devel@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: Thinkpad R40 freezes after swsusp resume
Message-ID: <20050222142217.GA24536@butterfly.hjsoft.com>
References: <20050216195940.GA32423@butterfly.hjsoft.com>
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On Wed, Feb 16, 2005 at 02:59:40PM -0500, John M Flinchbaugh wrote:
> correcting the problem, so I can get swsusp and ACPI coexisting=20
> happily
> on my Thinkpad R40.
> Does anyone here on the ACPI list have some logical next steps for=20
> me to
> test?
> ----- Forwarded message from John M Flinchbaugh <john@hjsoft.com>=20
> As Murphy's Law would have it, I usually get these lockups at=20
> inopportune times when I really don't want to have to punch the=20
> power=20
> button, like when I'm in a hurry trying to find something or during
> long-running network backups.  It also does it when sitting idle, so
> this isn't a rule.
>=20
> I've run most of a backup from an NFS mount to the local drive (for
> about 10 minutes), stopped it, swsusp, ran another backup, and it's
> looking fine so far.
>=20
> To be sure that it's not going to freeze, I'd almost have to let it=20
> go
> for a week, though, because sometimes I had just gotten lucky and=20
> not
> seen the issue for upto 4 days at a time.
> ----- End forwarded message -----

I've recompiled my 2.6.11-rc4 kernel without ACPI sleep states, and I've
enabled lots of debugging.

Upon swsusp, I see this oops:
[nosave pfn 0x38c]<7>[nosave pfn 0x38d]<3>Debug: sleeping function
called from invalid context at mm/slab.c:2082
in_atomic():0, irqs_disabled():1
 [<c0102b07>] dump_stack+0x17/0x20
 [<c0110e0c>] __might_sleep+0xac/0xc0
 [<c01397ae>] kmem_cache_alloc+0x5e/0x60
 [<c020dbf9>] acpi_pci_link_set+0x7a/0x24e
 [<c020e292>] acpi_pci_link_resume+0x47/0x7d
 [<c020e30d>] irqrouter_resume+0x45/0x6d
 [<c0234357>] sysdev_resume+0xf7/0xfc
 [<c02386e8>] device_power_up+0x8/0xe
 [<c012e798>] swsusp_suspend+0x48/0x50
 [<c012ebb1>] pm_suspend_disk+0x51/0xc0
 [<c012d07a>] enter_state+0x8a/0x90
 [<c012d1b3>] state_store+0xa3/0xaa
 [<c0186ce7>] subsys_attr_store+0x37/0x40
 [<c0186f4e>] flush_write_buffer+0x2e/0x40
 [<c0186fcf>] sysfs_write_file+0x6f/0x90
 [<c014f004>] vfs_write+0xa4/0x110
 [<c014f121>] sys_write+0x41/0x70
 [<c01025af>] syscall_call+0x7/0xb

Otherwise, the swsusp works and resumes.

After the resume, I see these messages:
Feb 22 09:00:54 navi kernel: osl-0958 [1385] os_wait_semaphore     :
Failed to acquire semaphore[c14de5e0|1|0], AE_TIME
Feb 22 09:04:29 navi kernel: osl-0958 [1734] os_wait_semaphore     :
Failed to acquire semaphore[c14de5e0|1|0], AE_TIME
Feb 22 09:07:53 navi kernel: osl-0958 [2076] os_wait_semaphore     :
Failed to acquire semaphore[c14de5e0|1|0], AE_TIME
Feb 22 09:12:09 navi kernel: osl-0958 [2534] os_wait_semaphore     :
Failed to acquire semaphore[c14de5e0|1|0], AE_TIME

I haven't frozen the box yet, but I wouldn't be surprised if these
contribute to the conditions that cause the freeze.

Thanks.
--=20
John M Flinchbaugh
john@hjsoft.com

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