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Date: Wed, 1 Sep 2010 08:47:19 +0200 From: Matthias Dahl <ml_kernel@...tal-soul.de> To: linux-kernel@...r.kernel.org Subject: [2.6.35.x regression] rcu_preempt_state stall warning and machine slow-downs Hi. I've a recurring problem w/ kernel 2.6.35.x that I cannot pinpoint exactly but seems to be related to rcu_preempt_state stall warnings I get frequently. From time to time, the machine slows down to an almost halt (meaning jumpy or non-responsive mouse cursor, unable to switch to text console, ...) which can also result in a complete hang w/o any way to recover. Sometimes the system catches up again but once this happened, the system is sluggish and a reboot is required nevertheless. High load seems to help a lot to trigger this issue. In every instance, I found stall warnings in my log which might be related. I have attached three of them along with my config and dmesg. The system works flawlessly with pre-2.6.35 kernels- no stall warnings and no slow-downs at all. If there is anything I can do to help further diagnose this problem, please let me know. So long, matthias. PS. Please cc' me because I am not subscribed to the list. Thanks a lot. Download attachment "config.gz" of type "application/x-gzip" (13554 bytes) Download attachment "backtrace2.gz" of type "application/x-gzip" (3572 bytes) Download attachment "backtrace1.gz" of type "application/x-gzip" (3737 bytes) Download attachment "backtrace3.gz" of type "application/x-gzip" (3630 bytes) Download attachment "dmesg.gz" of type "application/x-gzip" (11974 bytes)
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