Messages in this thread | | | From | Andrea Righi <> | Subject | Re: [RFC][v2][patch 0/12][CFQ-cgroup]Yet another I/O bandwidth controlling subsystem for CGroups based on CFQ | Date | Fri, 30 May 2008 12:37:25 +0200 (MEST) |
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Satoshi UCHIDA wrote: > Hi, Tsuruta-san. > >> I'm looking forward to your report.
Hi Satoshi,
I'm testing your patch agains latest Linus git and I've got the following bug. It can be easily reproduced creating a cgroup, switching the i/o scheduler from cfq to any other and switch back to cfq again.
-Andrea
BUG: unable to handle kernel paging request at ffffffeb IP: [<c0212dc6>] cfq_cgroup_sibling_tree_add+0x36/0x90 Oops: 0000 [#1] SMP Modules linked in: i2c_piix4 ne2k_pci 8390 i2c_core
Pid: 3543, comm: bash Not tainted (2.6.26-rc4 #1) EIP: 0060:[<c0212dc6>] EFLAGS: 00010286 CPU: 0 EIP is at cfq_cgroup_sibling_tree_add+0x36/0x90 EAX: 00000003 EBX: c7704c90 ECX: ffffffff EDX: c7102180 ESI: c7102240 EDI: c7704c80 EBP: c7afbe94 ESP: c7afbe80 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process bash (pid: 3543, ti=c7afa000 task=c7aeda00 task.ti=c7afa000) Stack: c7704c90 c71022d0 c7ace078 c7704c80 c71020c0 c7afbea8 c021363c c7ace078 c7803460 c71020c0 c7afbebc c021360a c7102184 c71020c0 c7102180 c7afbee4 c02134e0 00000000 c7102184 c72b8ab0 00000001 c7102140 c72b8ab0 c04b8ac0 Call Trace: [<c021363c>] ? cfq_cgroup_init_cfq_data+0x7c/0x80 [<c021360a>] ? cfq_cgroup_init_cfq_data+0x4a/0x80 [<c02134e0>] ? __cfq_cgroup_init_queue+0x100/0x1e0 [<c021097b>] ? cfq_init_queue+0xb/0x10 [<c0204ff8>] ? elevator_init_queue+0x8/0x10 [<c0205cd0>] ? elv_iosched_store+0x80/0x2b0 [<c0209379>] ? queue_attr_store+0x49/0x70 [<c01c488b>] ? sysfs_write_file+0xbb/0x110 [<c0186276>] ? vfs_write+0x96/0x160 [<c01c47d0>] ? sysfs_write_file+0x0/0x110 [<c018696d>] ? sys_write+0x3d/0x70 [<c0104267>] ? sysenter_past_esp+0x78/0xd1 ======================= Code: ec 08 8b 82 90 00 00 00 83 e0 fc 89 45 f0 8d 82 90 00 00 00 39 45 f0 75 5f 8d 47 10 89 45 ec 89 c3 31 c0 eb 11 8b 56 7c 8d 41 04 <3b> 51 ec 8d 59 08 0f 43 d8 89 c8 8b 0b 85 c9 75 e9 89 86 90 00 EIP: [<c0212dc6>] cfq_cgroup_sibling_tree_add+0x36/0x90 SS:ESP 0068:c7afbe80 ---[ end trace 9701f4859bb53d27 ]---
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