From: "Richard W.M. Jones" <rjones@redhat.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Fam Zheng <famz@redhat.com>, Hu Tao <hutao@cn.fujitsu.com>,
qemu-devel@nongnu.org, Max Reitz <mreitz@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Yasunori Goto <y-goto@jp.fujitsu.com>
Subject: Re: [Qemu-devel] [PATCH v13 5/6] raw-posix: Add full preallocation option
Date: Thu, 4 Sep 2014 13:45:19 +0100 [thread overview]
Message-ID: <20140904124519.GB1302@redhat.com> (raw)
In-Reply-To: <20140904123522.GH3897@noname.str.redhat.com>
On Thu, Sep 04, 2014 at 02:35:22PM +0200, Kevin Wolf wrote:
> Please change the code to always write zeros for FULL,
How is this useful for anyone? You don't know if the underlying SAN
is going to detect these zeroes or combine these blocks together.
It's just slow for no reason.
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
Fedora Windows cross-compiler. Compile Windows programs, test, and
build Windows installers. Over 100 libraries supported.
http://fedoraproject.org/wiki/MinGW
next prev parent reply other threads:[~2014-09-04 12:45 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-29 8:33 [Qemu-devel] [PATCH v13 0/6] qcow2, raw: add preallocation=full Hu Tao
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 1/6] block: round up file size to nearest sector Hu Tao
2014-08-29 12:50 ` Eric Blake
2014-09-04 9:33 ` Kevin Wolf
2014-09-02 21:21 ` Max Reitz
2014-09-04 9:43 ` Kevin Wolf
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 2/6] block: don't convert file size to sector size Hu Tao
2014-09-02 21:24 ` Max Reitz
2014-09-04 9:57 ` Kevin Wolf
2014-09-05 9:07 ` Hu Tao
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 3/6] rename parse_enum_option to qapi_enum_parse and make it public Hu Tao
2014-09-02 21:27 ` Max Reitz
2014-09-03 1:30 ` Hu Tao
2014-09-04 10:03 ` Kevin Wolf
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 4/6] qapi: introduce PreallocMode and a new PreallocMode full Hu Tao
2014-09-02 21:32 ` Max Reitz
2014-09-03 1:31 ` Hu Tao
2014-09-02 21:51 ` Eric Blake
2014-09-03 1:35 ` Hu Tao
2014-09-04 12:17 ` Kevin Wolf
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 5/6] raw-posix: Add full preallocation option Hu Tao
2014-08-29 8:48 ` Richard W.M. Jones
2014-09-03 1:26 ` Hu Tao
2014-09-04 8:32 ` Hu Tao
2014-09-02 21:45 ` Max Reitz
2014-09-03 1:55 ` Hu Tao
2014-09-04 12:35 ` Kevin Wolf
2014-09-04 12:45 ` Richard W.M. Jones [this message]
2014-09-04 12:52 ` Kevin Wolf
2014-09-04 13:07 ` Richard W.M. Jones
2014-09-04 13:13 ` Daniel P. Berrange
2014-09-04 13:17 ` Kevin Wolf
2014-09-04 13:43 ` Richard W.M. Jones
2014-09-04 15:23 ` Kevin Wolf
2014-09-04 15:33 ` Richard W.M. Jones
2014-08-29 8:33 ` [Qemu-devel] [PATCH v13 6/6] qcow2: " Hu Tao
2014-09-02 21:55 ` Max Reitz
2014-09-04 13:09 ` Kevin Wolf
2014-09-09 3:23 ` Hu Tao
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140904124519.GB1302@redhat.com \
--to=rjones@redhat.com \
--cc=famz@redhat.com \
--cc=hutao@cn.fujitsu.com \
--cc=kwolf@redhat.com \
--cc=mreitz@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=stefanha@redhat.com \
--cc=y-goto@jp.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).