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Message-Id: <20080707190838.607667440@goop.org>
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Date: Mon, 07 Jul 2008 12:07:52 -0700
From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
       Jens Axboe <axboe@kernel.dk>, Peter Zijlstra <a.p.zijlstra@chello.nl>,
       Christoph Lameter <clameter@linux-foundation.org>,
       Petr Tesarik <ptesarik@suse.cz>,
       Virtualization <virtualization@lists.linux-foundation.org>,
       Xen devel <xen-devel@lists.xensource.com>,
       Thomas Friebel <thomas.friebel@amd.com>,
       Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: [PATCH RFC 3/4] xen: use lock-byte spinlock implementation
Content-Disposition: inline; filename=xen-use-byte-locks.patch
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Switch to using the lock-byte spinlock implementation, to avoid the
worst of the performance hit from ticket locks.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Thomas Friebel <thomas.friebel@amd.com>
---
 arch/x86/xen/smp.c |    1 +
 1 file changed, 1 insertion(+)

===================================================================
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -430,4 +430,5 @@
 {
 	smp_ops = xen_smp_ops;
 	xen_fill_possible_map();
+	paravirt_use_bytelocks();
 }

--