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xen-devel
[Xen-devel] [PATCH RFC 3/4] xen: use lock-byte spinlock implementation
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To: |
Nick Piggin <nickpiggin@xxxxxxxxxxxx> |
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Subject: |
[Xen-devel] [PATCH RFC 3/4] xen: use lock-byte spinlock implementation |
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From: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
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Date: |
Mon, 07 Jul 2008 12:07:52 -0700 |
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Cc: |
Jens Axboe <axboe@xxxxxxxxx>, Xen devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>, Christoph Lameter <clameter@xxxxxxxxxxxxxxxxxxxx>, Petr Tesarik <ptesarik@xxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, Virtualization <virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Thomas Friebel <thomas.friebel@xxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx> |
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Delivery-date: |
Mon, 07 Jul 2008 12:19:18 -0700 |
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quilt/0.46-1 |
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@xxxxxxxxxx>
Cc: Thomas Friebel <thomas.friebel@xxxxxxx>
---
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();
}
--
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