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From: "Justin T. Gibbs" <gibbs@FreeBSD.org>
Date: Fri, 6 Apr 2012 21:19:29 +0000 (UTC)
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Subject: svn commit: r233961 - head/sys/x86/x86
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Author: gibbs
Date: Fri Apr  6 21:19:28 2012
New Revision: 233961
URL: http://svn.freebsd.org/changeset/base/233961

Log:
  Fix interrupt load balancing regression, introduced in revision
  222813, that left all un-pinned interrupts assigned to CPU 0.
  
  sys/x86/x86/intr_machdep.c:
  	In intr_shuffle_irqs(), remove CPU_SETOF() call that initialized
  	the "intr_cpus" cpuset to only contain CPU0.
  
  	This initialization is too late and nullifies the results of calls
  	the intr_add_cpu() that occur much earlier in the boot process.
  	Since "intr_cpus" is statically initialized to the empty set, and
  	all processors, including the BSP, already add themselves to
  	"intr_cpus" no special initialization for the BSP is necessary.
  
  MFC after:	3 days

Modified:
  head/sys/x86/x86/intr_machdep.c

Modified: head/sys/x86/x86/intr_machdep.c
==============================================================================
--- head/sys/x86/x86/intr_machdep.c	Fri Apr  6 20:34:00 2012	(r233960)
+++ head/sys/x86/x86/intr_machdep.c	Fri Apr  6 21:19:28 2012	(r233961)
@@ -525,9 +525,6 @@ intr_shuffle_irqs(void *arg __unused)
 	return;
 #endif
 
-	/* The BSP is always a valid target. */
-	CPU_SETOF(0, &intr_cpus);
-
 	/* Don't bother on UP. */
 	if (mp_ncpus == 1)
 		return;