On Fri, 25 Nov 2011 18:20:31 +0530 Kautuk Consul <consul.kautuk@xxxxxxxxx> wrote: > Hi, > > I am running linux-2.6.35.31 on my ARM system and I got around 197 > schedule while atomics and then finally a kernel crash. > > Can anyone suggest some MMpatches to apply on this fix this problem ? > > I got the following schedule while atomic log around 197 times: > ------------------------------------------------------------------------------------------ > Backtrace(CPU 0): > [<c00393a0>] (dump_backtrace+0x0/0x11c) from [<c0393728>] (dump_stack+0x20/0x24) > [<c0393708>] (dump_stack+0x0/0x24) from [<c0058ad0>] (__schedule_bug+0x70/0x7c) > [<c0058a60>] (__schedule_bug+0x0/0x7c) from [<c03939f8>] (schedule+0x74/0x5a4) > r5:d2002000 r4:d1f79440 > [<c0393984>] (schedule+0x0/0x5a4) from [<c03948a0>] > (schedule_timeout+0x2c8/0x304) > [<c03945d8>] (schedule_timeout+0x0/0x304) from [<c0393958>] > (io_schedule_timeout+0x50/0x7c) > r7:d1f79440 r6:d2002000 r5:c04c0088 r4:c04bfc88 > [<c0393908>] (io_schedule_timeout+0x0/0x7c) from [<c0109cbc>] > (congestion_wait+0x7c/0xa0) > r6:00000019 r5:c04c6230 r4:d2003edc r3:00000000 > [<c0109c40>] (congestion_wait+0x0/0xa0) from [<c0102268>] (kswapd+0x594/0x61c) > r7:00000000 r6:c04d7a28 r5:00000008 r4:c04d76f4 > [<c0101cd4>] (kswapd+0x0/0x61c) from [<c007db6c>] (kthread+0x90/0x98) > [<c007dadc>] (kthread+0x0/0x98) from [<c00642f4>] (do_exit+0x0/0x708) > r7:00000013 r6:c00642f4 r5:c007dadc r4:d1f47f3c > BUG: scheduling while atomic: kswapd0/16/0x00000000 > Hmm, it seems strange and I never see this. This seems __schedule_bug() is called but preempt_count() is 0x00000000. Could you show your .config ? Regards, -Kame -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>