Hello All, My test server crashed a few days ago. The kernel was built from Linus' git without any additional changes. I don't know how to reproduce this bug. [532284.563576] BUG: unable to handle kernel paging request at 0000000035c83420 [532284.564086] IP: [<ffffffff810caf17>] cpuacct_charge+0x97/0x1e0 [532284.564086] PGD 116369067 PUD 116368067 PMD 0 [532284.564086] Thread overran stack, or stack corrupted [532284.564086] Oops: 0000 [#1] SMP [532284.564086] Modules linked in: veth binfmt_misc ip6table_filter ip6_tables tun netlink_diag af_packet_diag udp_diag tcp_diag inet_diag unix_diag bridge stp llc btrfs libcrc32c xor raid6_pq microcode i2c_piix4 joydev virtio_balloon virtio_net pcspkr i2c_core virtio_blk virtio_pci virtio_ring virtio floppy [532284.564086] CPU: 2 PID: 2487 Comm: cat Not tainted 3.13.0 #160 [532284.564086] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007 [532284.564086] task: ffff8800cdb60000 ti: ffff8801167ee000 task.ti: ffff8801167ee000 [532284.564086] RIP: 0010:[<ffffffff810caf17>] [<ffffffff810caf17>] cpuacct_charge+0x97/0x1e0 [532284.564086] RSP: 0018:ffff8801167ee638 EFLAGS: 00010002 [532284.564086] RAX: 000000000000e540 RBX: 000000000006086c RCX: 000000000000000f [532284.564086] RDX: ffffffff81c4e960 RSI: ffffffff81c50640 RDI: 0000000000000046 [532284.564086] RBP: ffff8801167ee668 R08: 0000000000000003 R09: 0000000000000001 [532284.564086] R10: 0000000000000001 R11: 0000000000000004 R12: ffff8800cdb60000 [532284.564086] R13: 00000000167ee038 R14: ffff8800db3576d8 R15: 000080ee26ec7dcf [532284.564086] FS: 00007fc30ecc7740(0000) GS:ffff88011b200000(0000) knlGS:0000000000000000 [532284.564086] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [532284.564086] CR2: 0000000035c83420 CR3: 000000011f966000 CR4: 00000000000006e0 [532284.564086] Stack: [532284.564086] ffffffff810cae80 ffff880100000014 ffff8800db333480 000000000006086c [532284.564086] ffff8800cdb60068 ffff8800cdb60000 ffff8801167ee6a8 ffffffff810b948f [532284.564086] ffff8801167ee698 ffff8800cdb60068 ffff8800db333480 0000000000000001 [532284.564086] Call Trace: [532284.564086] [<ffffffff810cae80>] ? cpuacct_css_alloc+0xb0/0xb0 [532284.564086] [<ffffffff810b948f>] update_curr+0x13f/0x220 [532284.564086] [<ffffffff810bfeb4>] dequeue_entity+0x24/0x5b0 [532284.564086] [<ffffffff8101ea59>] ? sched_clock+0x9/0x10 [532284.564086] [<ffffffff810c0489>] dequeue_task_fair+0x49/0x430 [532284.564086] [<ffffffff810acbb3>] dequeue_task+0x73/0x90 [532284.564086] [<ffffffff810acbf3>] deactivate_task+0x23/0x30 [532284.564086] [<ffffffff81745b11>] __schedule+0x501/0x960 [532284.564086] [<ffffffff817460b9>] schedule+0x29/0x70 [532284.564086] [<ffffffff81744eac>] schedule_timeout+0x14c/0x2a0 [532284.564086] [<ffffffff810835f0>] ? del_timer+0x70/0x70 [532284.564086] [<ffffffff8174b7d0>] ? _raw_spin_unlock_irqrestore+0x40/0x80 [532284.564086] [<ffffffff8174547f>] io_schedule_timeout+0x9f/0x100 [532284.564086] [<ffffffff810d16dd>] ? trace_hardirqs_on+0xd/0x10 [532284.564086] [<ffffffff81182b22>] mempool_alloc+0x152/0x180 [532284.564086] [<ffffffff810c56e0>] ? bit_waitqueue+0xd0/0xd0 [532284.564086] [<ffffffff810558c7>] ? kvm_clock_read+0x27/0x40 -- 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>