Re: [RFC] IO Controller

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Vivek Goyal wrote:
> Hi All,
> 
> Here is another posting for IO controller patches. Last time I had posted
> RFC patches for an IO controller which did bio control per cgroup.

  Hi Vivek,

  I got the following OOPS when testing, can't reproduce again :(

kernel BUG at block/elevator-fq.c:1396!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/block/hdb/queue/scheduler
Modules linked in: ipv6 cpufreq_ondemand acpi_cpufreq dm_mirror dm_multipath sbd
Pid: 5032, comm: rmdir Not tainted (2.6.29-rc7-vivek #17) Veriton M460
EIP: 0060:[<c04ec7de>] EFLAGS: 00010082 CPU: 0
EIP is at iocg_destroy+0xdc/0x14e
EAX: 00000000 EBX: f62278b4 ECX: f6207800 EDX: f6227904
ESI: f6227800 EDI: f62278a0 EBP: 00000003 ESP: c8790f00
 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
Process rmdir (pid: 5032, ti=c8790000 task=f6636960 task.ti=c8790000)
Stack:
 f53cc5c0 f62b7258 f10991c8 00000282 f6227800 c0733fa0 ec1c5140 edfc6d34
 c8790000 c04463ce f6a4c84c edfc6d34 0804c840 c048883c f6a4c84c f6a4c84c
 c04888d6 f6a4c84c 00000000 c04897de f6a4c84c c048504c f115f4c0 ebc37954
Call Trace:
 [<c04463ce>] cgroup_diput+0x41/0x8c
 [<c048883c>] dentry_iput+0x45/0x5e
 [<c04888d6>] d_kill+0x19/0x32
 [<c04897de>] dput+0xd8/0xdf
 [<c048504c>] do_rmdir+0x8f/0xb6
 [<c06330fc>] do_page_fault+0x2a2/0x579
 [<c0402fc1>] sysenter_do_call+0x12/0x21
 [<c0630000>] schedule+0x641/0x830
Code: 08 00 74 04 0f 0b eb fe 83 7f 04 00 74 04 0f 0b eb fe 45 83 c3 1c 83 fd 0
EIP: [<c04ec7de>] iocg_destroy+0xdc/0x14e SS:ESP 0068:c8790f00

-- 
Regards
Gui Jianfeng

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