linux-kernel - Re: warning report

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Date:	Mon, 27 Oct 2008 23:57:35 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Todor Gyumyushev <todor@...urnosoft.biz>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: warning report

Andrew Morton wrote:
> (cc linux-ide)
> 
>> On Sun, 12 Oct 2008 20:42:02 +0300 Todor Gyumyushev <todor@...urnosoft.biz> wrote:
>> [ 3724.989177] cdrom: This disc doesn't have any tracks I recognize!
>> [ 4953.736107] ------------[ cut here ]------------
>> [ 4953.736117] WARNING: at drivers/ata/libata-sff.c:944 
>> ata_sff_hsm_move+0x47d/0x6a0 [libata]()
>> [ 4953.736121] Modules linked in: i915 drm eth1394 ipt_MASQUERADE 
>> iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack ip_tables x_tables tun 
>> kvm acpi_cpufreq freq_table hci_usb rfcomm l2cap bluetooth vboxdrv nfsd 
>> lockd nfs_acl auth_rpcgss sunrpc exportfs ipv6 ac battery fuse loop 
>> snd_hda_intel snd_pcm_oss snd_mixer_oss arc4 ecb snd_pcm 
>> crypto_blkcipher snd_timer video ath5k snd mac80211 backlight usblp 
>> led_class soundcore rng_core tpm_infineon intel_agp iTCO_wdt 
>> snd_page_alloc output iTCO_vendor_support i2c_i801 rtc_cmos tpm cfg80211 
>> i2c_core button tpm_bios evdev usbhid hid ext3 jbd mbcache sg sr_mod 
>> cdrom sd_mod crc_t10dif ohci1394 ata_piix libata scsi_mod ieee1394 dock 
>> ehci_hcd uhci_hcd sky2 thermal processor fan thermal_sys hwmon [last 
>> unloaded: kvm_intel]
>> [ 4953.736215] Pid: 0, comm: swapper Not tainted 2.6.27 #1
>> [ 4953.736218]
>> [ 4953.736219] Call Trace:
>> [ 4953.736223]  <IRQ>  [<ffffffff8023c9c4>] warn_on_slowpath+0x64/0xb0
>> [ 4953.736255]  [<ffffffffa0062ac8>] scsi_dispatch_cmd+0x128/0x2d0 
>> [scsi_mod]
>> [ 4953.736278]  [<ffffffffa0068e85>] scsi_request_fn+0x95/0x420 [scsi_mod]
>> [ 4953.736282]  [<ffffffff80346b25>] __blk_run_queue+0x65/0x110
>> [ 4953.736293]  [<ffffffffa00a06c8>] ata_sff_data_xfer+0x98/0xc0 [libata]
>> [ 4953.736297]  [<ffffffff80340000>] crypto_attr_alg_name+0x30/0x40
>> [ 4953.736307]  [<ffffffffa009fe9d>] ata_sff_hsm_move+0x47d/0x6a0 [libata]
>> [ 4953.736317]  [<ffffffffa0069693>] scsi_end_request+0xa3/0xb0 [scsi_mod]
>> [ 4953.736328]  [<ffffffffa00a0413>] ata_sff_interrupt+0x1a3/0x2c0 [libata]
>> [ 4953.736331]  [<ffffffff80283aa4>] handle_IRQ_event+0x34/0x70
>> [ 4953.736334]  [<ffffffff802850f0>] handle_edge_irq+0xc0/0x160
>> [ 4953.736337]  [<ffffffff8020f92c>] do_IRQ+0x7c/0x100
>> [ 4953.736339]  [<ffffffff8020c941>] ret_from_intr+0x0/0xa
>> [ 4953.736341]  <EOI>  [<ffffffffa000d637>] 
>> acpi_idle_enter_simple+0x1c7/0x237 [processor]
>> [ 4953.736352]  [<ffffffffa000d62d>] acpi_idle_enter_simple+0x1bd/0x237 
>> [processor]
>> [ 4953.736356]  [<ffffffff803eebf7>] cpuidle_idle_call+0xd7/0x120
>> [ 4953.736358]  [<ffffffff8020b306>] cpu_idle+0x66/0xf0
>> [ 4953.736360]
>> [ 4953.736361] ---[ end trace 8d1ccc07ba5c0659 ]---

Eh... this really shouldn't happen.  How often does the problem occur?
Is there a way to reproduce this problem reliably?

Thanks.

-- 
tejun
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