From: Avi Kivity <avi@qumranet.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Wipe patch
Date: Wed, 26 Jul 2006 12:19:53 +0300 [thread overview]
Message-ID: <44C733B9.9080705@qumranet.com> (raw)
In-Reply-To: <44C72AD0.1090004@wasp.net.au>
Brad Campbell wrote:
> ZIGLIO, Frediano, VF-IT wrote:
>> Hi,
>> well, this is not a definitive patch but it works. The aim is to be
>> able to wipe the disk without allocating entire space. When you wipe a
>> disk the program fill disk with zero bytes so disk image increase to
>> allocate all space. This just patch detect null byte writes and do not
>> write all zero byte clusters.
>
> This _looks_ like it would severely impact cpu load during a write.
> Have you done any testing to determine if this is likely to impact a
> normal usage scenario?
Why would it? In most cases, the zero test would terminate quickly,
without accessing the entire cluster.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2006-07-26 9:20 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-26 8:23 [Qemu-devel] Wipe patch ZIGLIO, Frediano, VF-IT
2006-07-26 8:41 ` Brad Campbell
2006-07-26 9:19 ` Avi Kivity [this message]
2006-07-26 9:35 ` Brad Campbell
2006-08-02 2:25 ` Brad Campbell
2006-08-02 2:49 ` andrzej zaborowski
2006-08-02 2:51 ` andrzej zaborowski
2006-08-02 3:09 ` Brad Campbell
2006-08-02 7:39 ` Nigel Horne
2006-08-02 17:32 ` Andreas Bollhalder
-- strict thread matches above, loose matches on Subject: below --
2006-07-26 8:48 ZIGLIO, Frediano, VF-IT
2006-07-26 9:42 ZIGLIO, Frediano, VF-IT
2006-07-26 9:52 ` Brad Campbell
2006-08-02 12:53 ZIGLIO, Frediano, VF-IT
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=44C733B9.9080705@qumranet.com \
--to=avi@qumranet.com \
--cc=qemu-devel@nongnu.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.