Re: Updated performance results

Steven Pratt
2009-09-16T18:15:12Z

Chris Mason wrote:
> On Wed, Sep 16, 2009 at 12:57:22PM -0500, Steven Pratt wrote:
>
>> Steven Pratt wrote:
>>
>>> Chris Mason wrote:
>>>
>>>> On Mon, Sep 14, 2009 at 04:41:48PM -0500, Steven Pratt wrote:
>>>>
>>>>> Only bit of bad news is I did get one error that crashed the system
>>>>> on single threaded nocow run. So that data point is missing.
>>>>> Output below:
>>>>>
>>>> I hope I've got this fixed. If you pull from the master branch of
>>>> btrfs-unstable there are fixes for async thread races. The single
>>>> patch I sent before is included, but not enough.
>>>>
>>> Glad you said that. Keeps me from sending the email that said the
>>> patch didn't help :-)
>>>
>>> Steve
>>>
>> Well, still getting oopses even with new code.
>>
>> Lots of:
>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] BUG: soft lockup -
>> CPU#10 stuck for 61s! [btrfs-endio-1:30250]
>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] Pid: 30250, comm:
>> btrfs-endio-1 Not tainted 2.6.31-autokern1 #1 IBM x3950-[88726RU]-
>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] RIP:
>> 0010:[<ffffffff81153920>] [<ffffffff81153920>] crc32c+0x20/0x26
>>
>
> If I'm reading this right, you've got a softlockup in crc32c? Something
> has gone really wrong here. Are you reusing datasets from old runs?
>
No, mkfs before every run.

Steve

> -chris
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