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

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Message-Id: <20151027.201919.383313270896131203.davem@davemloft.net>
Date:	Tue, 27 Oct 2015 20:19:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mst@...hat.com
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

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>

Applied.
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