From: Avi Kivity <avi@redhat.com>
To: Bill Davidsen <davidsen@tmr.com>
Cc: KVM list <kvm@vger.kernel.org>
Subject: Re: Setting disk parameters in a VM
Date: Sun, 15 Mar 2009 12:40:44 +0200 [thread overview]
Message-ID: <49BCDB2C.60407@redhat.com> (raw)
In-Reply-To: <49BA90B2.80804@tmr.com>
Bill Davidsen wrote:
> Based on a discussion in another list on ioschedulers, I added a few
> lines to my rc.local to set the scheduler to "noop" for disks with
> model QEMU*, to the scheduling in the VM will not be computing with
> the scheduling in the host.
>
> I wonder if the same thinking applies to the "rotational" feature
> added to /sys/block in 2.6.29, intended for SSD but probably
> appropriate for virtual and nbd devices as well.
A virtual disk backed by a rotational physical disk probably should be
marked rotational, at least with cache=off.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2009-03-15 10:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-13 16:58 Setting disk parameters in a VM Bill Davidsen
2009-03-15 10:40 ` Avi Kivity [this message]
2009-03-15 20:42 ` Bill Davidsen
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