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]
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