From: Chris Mason <chris.mason@oracle.com>
To: john <yyalone@gmail.com>, "Yan, Zheng" <zheng.yan@oracle.com>,
linux-btrfs@vger.kernel.org
Subject: Re: [PATCH 4/4] add snapshot/subvolume destroy ioctl
Date: Thu, 24 Sep 2009 09:59:55 -0400 [thread overview]
Message-ID: <20090924135955.GC2797@think> (raw)
In-Reply-To: <20090924124322.GB2797@think>
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:
> > After a git bisect, I think this patch may introduce a performance
> > regression(about 15% slower) in postmark benchmark. Sometimes(last a few
> > seconds) in the test, CPU usage is 100% wait but NO IO is performing, it's
> > not IO-wait. This didn't happen for earlier versions.
> > test*environment:
> > hard disk: INTEL X25-E SSD 64G
> > mkfs options: mkfs.btrfs -m single /dev/xxx
> > mount options: -o ssd,nodatasum,nodatacow
>
> Thanks, I'll give this a shot here.
Looks like Yan Zheng already tracked it down. I've pushed his fix out
to the master branch.
Thanks,
Chris
next prev parent reply other threads:[~2009-09-24 13:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-18 12:19 [PATCH 4/4] add snapshot/subvolume destroy ioctl Yan, Zheng
[not found] ` <4486336c0909240127v2a3320c7s52db89b12d1d7272@mail.gmail.com>
2009-09-24 12:43 ` Chris Mason
2009-09-24 13:59 ` Chris Mason [this message]
2009-09-25 1:45 ` Zhang Jingwang
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