On 09/09/2012 12:59 AM, Fengguang Wu wrote:
Hi John,The below lockup warning pops up very occasionally in kvm guest kernels and it's bisected down to commit 2a8c0883c3cfffcc148ea606e2a4e7453cd75e73 Author: John Stultz <[email protected]> Date: Fri Jul 13 01:21:56 2012 -0400 time: Move xtime_nsec adjustment underflow handling timekeeping_adjust [ 8.340327] Freeing unused kernel memory: 460k freed [ 1107.515496] [sched_delayed] sched: RT throttling activated [ 1107.516439] BUG: soft lockup - CPU#1 stuck for 1024s! [swapper/1:0]
Thanks so much for sending this. One detail I'm curious about is that these kernels from the Bug messages seem to be v3.6-rc1 or earlier.
Ingo had a fix 1d17d17484d40f2d5b35c79518597a2b25296996 ("time: Fix adjustment cleanup bug in timekeeping_adjust") that landed in 3.6-rc2
Has this issue actually been seen on a 3.6-rc2+ kernel? thanks -john -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
