From: Pekka Enberg <penberg@kernel.org>
To: Sasha Levin <levinsasha928@gmail.com>
Cc: "Lan, Tianyu" <tianyu.lan@intel.com>,
Kevin Wolf <kwolf@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"asias.hejun@gmail.com" <asias.hejun@gmail.com>,
"prasadjoshi124@gmail.com" <prasadjoshi124@gmail.com>
Subject: RE: [RFC v2 PATCH] kvm tools, qcow: Add the support for copy-on-write clusters
Date: Sun, 20 Nov 2011 12:59:31 +0200 [thread overview]
Message-ID: <1321786772.1428.116.camel@jaguar> (raw)
In-Reply-To: <1321770182.3525.2.camel@lappy>
On Sun, 2011-11-20 at 14:14 +0800, Lan, Tianyu wrote:
> > OK. Thx.
> > But fsync is too slow. I try to find a way to sync a range of file.
> > Are there any solutions to meet my purpose?
On Sun, 2011-11-20 at 08:23 +0200, Sasha Levin wrote:
> fdatasync() is as good as it'll get.
>
> tbh, maybe we should just consider opening QCOW images with O_SYNC and
> just get it over with?
No, lets not do that. It's easier to improve the performance of correct
code that doesn't use O_SYNC.
Pekka
next prev parent reply other threads:[~2011-11-20 10:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 8:47 [RFC v2 PATCH] kvm tools, qcow: Add the support for copy-on-write clusters Lan Tianyu
2011-11-18 10:10 ` Kevin Wolf
2011-11-19 2:09 ` Lan, Tianyu
2011-11-19 15:30 ` Lan, Tianyu
2011-11-19 16:26 ` Sasha Levin
2011-11-20 6:14 ` Lan, Tianyu
2011-11-20 6:23 ` Sasha Levin
2011-11-20 7:03 ` Lan, Tianyu
2011-11-20 10:59 ` Pekka Enberg [this message]
2011-11-21 8:30 ` Kevin Wolf
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