On Fri, 28 Jan 2011, CAI Qian wrote: > I can still reproduce this similar failure on both AMD and Intel NUMA > systems using the latest linus tree with the commit you mentioned. > Unfortunately, I can't get a clear sysrq/console output of it but only > a part of it (screenshot attached). > > It at least very easy to reproduce it for me by running LTP oom01 test > for both Magny-Cours and Nehalem-EX NUMA systems. > Are you sure this is the same issue? The picture you provided doesn't show the top of the stack so I don't know what it's doing, but the original report had this: oom02 R running task 0 2023 1969 0x00000088 0000000000000282 ffff88041d219df0 ffff88041fbf8ef0 ffffffff81100800 ffff880418ab5b18 0000000000000282 ffffffff8100c9ee ffff880418ab5ba8 0000000087654321 0000000000000000 ffff880000000000 0000000000000001 Call Trace: [<ffffffff81100800>] ? drain_local_pages+0x0/0x20 [<ffffffff8100c9ee>] ? apic_timer_interrupt+0xe/0x20 [<ffffffff81097ea6>] ? smp_call_function_many+0x1b6/0x210 [<ffffffff81097e82>] ? smp_call_function_many+0x192/0x210 [<ffffffff81100800>] ? drain_local_pages+0x0/0x20 [<ffffffff81097f22>] ? smp_call_function+0x22/0x30 [<ffffffff81068184>] ? on_each_cpu+0x24/0x50 [<ffffffff810fe68c>] ? drain_all_pages+0x1c/0x20 [<ffffffff81100d04>] ? __alloc_pages_nodemask+0x4e4/0x840 [<ffffffff81138e09>] ? alloc_page_vma+0x89/0x140 [<ffffffff8111c481>] ? handle_mm_fault+0x871/0xd80 [<ffffffff814a4ecd>] ? schedule+0x3fd/0x980 [<ffffffff8100c9ee>] ? apic_timer_interrupt+0xe/0x20 [<ffffffff8100c9ee>] ? apic_timer_interrupt+0xe/0x20 [<ffffffff814aadd3>] ? do_page_fault+0x143/0x4b0 [<ffffffff8100a7b4>] ? __switch_to+0x194/0x320 [<ffffffff814a4ecd>] ? schedule+0x3fd/0x980 [<ffffffff814a7ad5>] ? page_fault+0x25/0x30 and the reported symptom was kswapd running excessively. I'm pretty sure I fixed that with 2ff754fa8f41 (mm: clear pages_scanned only if draining a pcp adds pages to the buddy allocator). Absent the dmesg, it's going to be very difficult to diagnose an issue that isn't a panic. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>