From: Paolo Bonzini <pbonzini@redhat.com>
To: "Richard W.M. Jones" <rjones@redhat.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Trying to get fstrim / discard=unmap to work
Date: Wed, 12 Mar 2014 18:55:33 +0100 [thread overview]
Message-ID: <53209F95.7060905@redhat.com> (raw)
In-Reply-To: <20140311200050.GU1346@redhat.com>
Il 11/03/2014 21:00, Richard W.M. Jones ha scritto:
> However the
> fstrim is suspiciously fast, so there's no way it can be scanning the
> whole disk for deleted files. I don't think fstrim does what it says
> in the man page.
fstrim definitely has some cache inside. It may also have some bugs.
But when it works, it's pretty good at making du-on-the-host almost the
same as usage-in-the-guest.
Paolo
prev parent reply other threads:[~2014-03-12 17:55 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-10 16:11 [Qemu-devel] Trying to get fstrim / discard=unmap to work Richard W.M. Jones
2014-03-10 16:14 ` Richard W.M. Jones
2014-03-10 16:57 ` Paolo Bonzini
2014-03-10 17:15 ` Richard W.M. Jones
2014-03-11 20:00 ` Richard W.M. Jones
2014-03-12 17:55 ` Paolo Bonzini [this message]
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=53209F95.7060905@redhat.com \
--to=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=rjones@redhat.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 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.