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[Xen-changelog] [xen-unstable] [IA64] improve __cpu_die()
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| Subject: | [Xen-changelog] [xen-unstable] [IA64] improve __cpu_die() |
| From: | Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx> |
| Date: | Mon, 11 Aug 2008 05:50:40 -0700 |
| Delivery-date: | Mon, 11 Aug 2008 05:52:00 -0700 |
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# HG changeset patch
# User Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
# Date 1217233749 -32400
# Node ID bfddf170cef9e5e0b36e1d0c78f0ce7463c7f256
# Parent 01a3bba6b96da8f351b15e266517a1192b2d422f
[IA64] improve __cpu_die()
use udelay instead of nop loop.
This patch reduces __cpu_die() time much.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
xen/arch/ia64/linux-xen/smpboot.c | 4 +---
1 files changed, 1 insertion(+), 3 deletions(-)
diff -r 01a3bba6b96d -r bfddf170cef9 xen/arch/ia64/linux-xen/smpboot.c
--- a/xen/arch/ia64/linux-xen/smpboot.c Mon Jul 28 17:29:09 2008 +0900
+++ b/xen/arch/ia64/linux-xen/smpboot.c Mon Jul 28 17:29:09 2008 +0900
@@ -748,9 +748,7 @@ void __cpu_die(unsigned int cpu)
return;
}
#ifdef XEN
- /* XXX: There must be a better way to sleep */
- for (int j = 0; j < 1000000; j++)
- cpu_relax();
+ udelay(100 * 1000);
#else
msleep(100);
#endif
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