From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH] make blkfront/blktagp2 respect the elevator=xyz command line option
Date: Mon, 12 Oct 2009 15:32:40 -0400 [thread overview]
Message-ID: <20091012193240.GB15826@phenom.dumpdata.com> (raw)
In-Reply-To: <1255105914-2570-1-git-send-email-pbonzini@redhat.com>
On Fri, Oct 09, 2009 at 06:31:54PM +0200, Paolo Bonzini wrote:
> For some workloads, CFQ has better performance than the no-op scheduler
> that is forced by the blkfront driver. The only way to set a different
> scheduler is the sysfs interface, because elevator_init is called
> unconditionally. This patch allows one to use "elevator=cfq" as well.
>
> While one could argue that the driver's behavior is expected (after all
> "elevator=cfq" is the default and should not have any effect), the
> do-what-I-mean behavior implemented by this patch is more logical.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Are you going to follow another patch for the upstream driver as well?
Or is that not needed at all in the 2.6.31 tree?
next prev parent reply other threads:[~2009-10-12 19:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-09 16:31 [PATCH] make blkfront/blktagp2 respect the elevator=xyz command line option Paolo Bonzini
2009-10-09 16:57 ` Keir Fraser
2009-10-09 18:33 ` Daniel Stodden
2009-10-09 19:22 ` Keir Fraser
2009-10-12 8:34 ` Paolo Bonzini
2009-10-12 19:32 ` Konrad Rzeszutek Wilk [this message]
2009-10-13 7:48 ` Paolo Bonzini
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