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 Finally, I got the following kernel crash: -------------------------------------------------------- CPU: 0 Tainted: P (2.6.35.13 #1) PC is at __bug+0x2c/0x38 LR is at sub_preempt_count+0x48/0x64 pc : [<c00390dc>] lr : [<c0398984>] psr: 60000193 sp : d2003d78 ip : d2003cb0 fp : d2003d84 r10: 00000004 r9 : 00c83880 r8 : c0647838 r7 : c04d7960 r6 : 00000004 r5 : c0647820 r4 : d2003e64 r3 : 00000000 r2 : d2003cc8 r1 : c0398978 r0 : 00000034 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c53c7d Table: 7aad4059 DAC: 00000017 Process kswapd0 (pid: 16, stack limit = 0xd20022e8) Stack: (0xd2003d78 to 0xd2004000) 3d60: d2003dd4 d2003d88 3d80: c00ffd74 c00390bc d2003e6c 00000020 00000000 000641c4 fffffffc 00000002 3da0: 000641c3 00000004 00000005 c04d76f4 d2002000 d2003f44 c04d79f4 c04d79f8 3dc0: 00000000 00000000 d2003e9c d2003dd8 c010117c c00ffc54 00000002 c04d76f4 3de0: 00000000 00000001 00000020 00000000 00000001 c04d79ac c04d79b4 00000000 3e00: 1ae147ae c04d79a8 c04d79b0 c007dadc 00000000 00000001 d2003e3c d2003e28 3e20: c00fbd50 c00ff0b4 00000000 d2003e84 d2003e7c d2003e40 c00fbde4 c00fbd3c 3e40: c0061d80 d2003e60 d2003e60 d2003eb4 00000000 00000000 00000000 00000000 3e60: 00000000 c0647858 c0647878 00000000 d2003e9c 00000002 00000002 00000008 3e80: d2003f44 c04d76f4 00000000 00000000 d2003f0c d2003ea0 c0101a68 c0100fb0 3ea0: 00000008 d2003eb0 00000000 ffffffff 00000000 00000002 d2003ed4 00000000 3ec0: 00000000 00000010 0000002a c04d76f4 00000048 00000000 0001b836 00000000 3ee0: 00000000 c04d76f4 00000008 c04d76f4 00000000 c04d76f4 00000000 00000001 3f00: d2003fc4 d2003f10 c01020fc c0101714 00000000 c0055d4c c005a728 00000002 3f20: d2003f94 00000001 d2002000 0000ffbc 00000002 00000000 00000000 c04d7d90 3f40: c0393ec4 00000000 00000000 ffffffff 00000000 000000d0 00000001 00000001 3f60: 00000001 0000003c 00000002 00000001 00000000 00000000 00000000 d1f79440 3f80: c007e048 d2003f84 d2003f84 00000008 c0393ec4 00000000 00000000 d1f47f3c 3fa0: d2003fcc c0101cd4 c04d76f4 00000000 00000000 00000000 d2003ff4 d2003fc8 3fc0: c007db6c c0101ce0 00000000 00000000 d2003fd0 d2003fd0 d1f47f3c c007dadc 3fe0: c00642f4 00000013 00000000 d2003ff8 c00642f4 c007dae8 ff7f7fff beffffff Backtrace(CPU 0): [<c00390b0>] (__bug+0x0/0x38) from [<c00ffd74>] (isolate_pages_global+0x12c/0x2c0) [<c00ffc48>] (isolate_pages_global+0x0/0x2c0) from [<c010117c>] (shrink_list+0x1d8/0x764) [<c0100fa4>] (shrink_list+0x0/0x764) from [<c0101a68>] (shrink_zone+0x360/0x418) [<c0101708>] (shrink_zone+0x0/0x418) from [<c01020fc>] (kswapd+0x428/0x61c) [<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 Code: e59f0010 e1a01003 eb0d69d2 e3a03000 (e5833000) Thanks, Kautuk. -- 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>