Re: [PATCH 4/4] add snapshot/subvolume destroy ioctl

[Zhang Jingwang <yyalone@gmail.com>]

My test result confirms that it has been fixed. Thanks for your time.

2009/9/24 Chris Mason <chris.mason@oracle.com>:
> On Thu, Sep 24, 2009 at 08:43:22AM -0400, Chris Mason wrote:
>> On Thu, Sep 24, 2009 at 04:27:57PM +0800, john wrote:
>> > =A0 =A0After a git bisect, I think this patch may introduce a perf=
ormance
>> > =A0 =A0regression(about 15% slower) in postmark benchmark. Sometim=
es(last a few
>> > =A0 =A0seconds) in the test, CPU usage is 100% wait but NO IO is p=
erforming, it's
>> > =A0 =A0not IO-wait. This didn't happen for earlier versions.
>> > =A0 =A0test*environment:
>> > =A0 =A0hard disk: INTEL X25-E SSD 64G
>> > =A0 =A0mkfs options: mkfs.btrfs -m single /dev/xxx
>> > =A0 =A0mount options: -o ssd,nodatasum,nodatacow
>>
>> Thanks, I'll give this a shot here.
>
> Looks like Yan Zheng already tracked it down. =A0I've pushed his fix =
out
> to the master branch.
>
> Thanks,
> Chris
>
>



--=20
Zhang Jingwang
National Research Centre for High Performance Computers
Institute of Computing Technology, Chinese Academy of Sciences
No. 6, South Kexueyuan Road, Haidian District
Beijing, China
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