On Tue, 2014-03-11 at 18:20 -0400, Sasha Levin wrote: > On 03/11/2014 05:45 PM, Davidlohr Bueso wrote: > > On Tue, 2014-03-11 at 17:02 -0400, Sasha Levin wrote: > >> >On 03/11/2014 04:47 PM, Davidlohr Bueso wrote: > >>>> > >>Bingo! With the above patch: > >>>>> > >> > > >>>>> > >> >[ 243.565794] kernel BUG at mm/vmacache.c:76! > >>>>> > >> >[ 243.566720] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > >>>>> > >> >[ 243.568048] Dumping ftrace buffer: > >>>>> > >> >[ 243.568740] (ftrace buffer empty) > >>>>> > >> >[ 243.569481] Modules linked in: > >>>>> > >> >[ 243.570203] CPU: 10 PID: 10073 Comm: trinity-c332 Tainted: G W 3.14.0-rc5-next-20140307-sasha-00010-g1f812cb-dirty #143 > >>> > >and this is also part of the DEBUG_PAGEALLOC + trinity combo! I suspect > >>> > >the root cause it the same as Fengguang's report. > >> > > >> >The BUG still happens without DEBUG_PAGEALLOC. > > Any idea what trinity itself is doing? > > > > Could you add the following, I just want to make sure the bug isn't > > being caused by an overflow: > > Not hitting that WARN. Sasha, could you please try the following patch: https://lkml.org/lkml/2014/3/13/312 thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>