On Mon, Sep 22, 2014 at 08:56:23AM +0200, Stefan Priebe wrote: > >That's not the whole message; you just weren't able to capture it all. > >How are you capturing these messages, by the way? Serial console? > > Sorry this was an incomplete copy and paste by me. > > Here is the complete output: > [1578544.839610] BUG: soft lockup - CPU#7 stuck for 22s! [mysqld:29281] > [1578544.893450] Modules linked in: nf_conntrack_ipv4 nf_defrag_ipv4 OK, thanks, this is a known bug, where when ext4 is under heavy memory pressure, we can end up stalling in reclaim. This message indicates that the system got stalled for 22 seconds, which is not good, since it impacts the interactivity of your system, and increases the long-tail latency of requests to servers running on your system, but it doesn't cause any data loss or will cause any of your processes to crash or otherwise stop functioning (except for temporarily). It's something that we are working on, and there are patches which Zheng Liu submitted that still need a bit of polishing, but I hope to have it addressed soon. Cheers, - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
