From: Rik van Riel <riel@redhat.com>
Subject: [PATCH][RHEL5 Xen] fix profiling
Date: Thu, 16 Nov 2006 17:27:45 -0500
Bugzilla: 214886
Message-Id: <455CE5E1.1030300@redhat.com>
Changelog: Xen: fix profiling


The timer interrupt code did not call profile_tick(), which means
that things like systemtap were not working at all under the Xen
kernel.

Simply adding a call to profile_tick() to the timer_interrupt()
code seems to make things work again in my simple tests.

Bug #214886

-- 
All Rights Reversed

Index: latest/arch/i386/kernel/time-xen.c
===================================================================
--- latest.orig/arch/i386/kernel/time-xen.c
+++ latest/arch/i386/kernel/time-xen.c
@@ -715,6 +715,7 @@ irqreturn_t timer_interrupt(int irq, voi
 		rcu_check_callbacks(cpu, user_mode(regs));
 	scheduler_tick();
 	run_posix_cpu_timers(current);
+	profile_tick(CPU_PROFILING, regs);
 
 	return IRQ_HANDLED;
 }