Messages in this thread | | | Date | Sat, 11 Sep 2010 11:50:41 +0200 | From | Stefan Richter <> | Subject | [Bug 18252] spinlock lockup in __make_request <- submit_bio <- ondemand_readahead |
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Full quote for lkml:
bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=18252 > > Summary: spinlock lockup in __make_request <- submit_bio <- > ondemand_readahead > Product: IO/Storage > Version: 2.5 > Kernel Version: 2.6.36-rc3 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: Block Layer > AssignedTo: axboe@kernel.dk > ReportedBy: stefanr@s5r6.in-berlin.de > Regression: No > > > Created an attachment (id=29562) > --> (https://bugzilla.kernel.org/attachment.cgi?id=29562) > BUG screenshot > > After a week uptime of 2.6.36-rc3 (I ran 2.6.35 before that),
Almost two weeks uptime actually.
> I was greeted by a black screen of death today in the morning: > > (see screenshot in attachment; partial transcript:) > > sending NMI to all CPUs: > BUG: soinlock lockup on CPU#0, ktorrent/4313, ffff8802... > PID: 4313, comm: ktorrent Tainted: G M D W 2.6.36-rc3 #3 > Call Trace: > [...] do_raw_spin_lock+0x118/0x147 > [...] _raw_spin_lock_irq+0x44/0x49 > [...] ? __make_request+0x5c/0x400 > [...] __make_request+0x5c/0x400 > [...] generic_make_request+0x23a/0x2a9 > [...] submit_bio+0xad/b6 > [...] mpage_bio_submit... > [...] do_mpage_readpage... > [...] ? get_parent_ip... > [...] ? sub_preempt_count... > [...] ? __lru_cache_add... > [...] mpage_readpages... > [...] ? ext4_get_block... > [...] ? __alloc_pages_nodemask... > [...] ? ext4_get_block... > [...] ext4_readpages... > [...] __do_page_cache_readahead... > [...] ? __do_page_cache_readahead... > [...] ra_submit... > [...] ondemand_readahead... > > This is a system with Phenom II x4 and Radeon graphics. Since kernel mode > setting is fairly new for radeon, it is possible that the lockup happened with > earlier kernels too but simply ended in a lockup without trace dump to the > screen. IOW, it is not clear to me whether this is a regression or not. > > The bug happened while kaffeine wrote an MPEG 2 TS to the same filesystem from > which ktorrent was reading. Of course this kind of commonplace workload > happened without problem two or three times before during the week in which I > ran 2.6.36-rc3. >
(The screenshot is a bit large, hence I reported in bugzilla instead of the list.)
The kernel taint was due to prior apparently unrelated lockdep report, bug 17752 "2.6.36-rc3: inconsistent lock state (iprune_sem, shrink_icache_memory". And there were three machine check events ten days ago due to corrected ECC memory errors. -- Stefan Richter -=====-==-=- =--= -=-== http://arcgraph.de/sr/
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