linux-kernel - Re: [PATCH] vhost: fix performance on LE hosts

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Message-ID: <20151027175057-mutt-send-email-mst@redhat.com>
Date:	Tue, 27 Oct 2015 17:52:24 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org, gkurz@...ux.vnet.ibm.com,
	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] vhost: fix performance on LE hosts

On Tue, Oct 27, 2015 at 06:32:55AM -0700, David Miller wrote:
> From: "Michael S. Tsirkin" <mst@...hat.com>
> Date: Tue, 27 Oct 2015 11:37:39 +0200
> 
> > commit 2751c9882b947292fcfb084c4f604e01724af804 ("vhost: cross-endian
> > support for legacy devices") introduced a minor regression: even with
> > cross-endian disabled, and even on LE host, vhost_is_little_endian is
> > checking is_le flag so there's always a branch.
> > 
> > To fix, simply check virtio_legacy_is_little_endian first.
> > 
> > Cc: Greg Kurz <gkurz@...ux.vnet.ibm.com>
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> 
> Michael, do you want me to take this via the 'net' tree?

Sure - especially since it looks like I have nothing else for this merge
window (working on fixing shutdown races, but it's slow going).  Thanks
a lot!

-- 
MST
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