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authorSiddha, Suresh B <suresh.b.siddha@intel.com>2005-05-27 12:53:01 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-05-28 11:14:00 -0700
commit49f384b82b03416dd7e4fc77847a959fe3247362 (patch)
treeed1aa19960c663a43de0eb17df4a83825dcd5206 /arch
parent[PATCH] drop note_interrupt() for per-CPU for proper scaling (diff)
downloadlinux-dev-49f384b82b03416dd7e4fc77847a959fe3247362.tar.xz
linux-dev-49f384b82b03416dd7e4fc77847a959fe3247362.zip
[PATCH] x86: fix smp_num_siblings on buggy BIOSes
This fixes 'smp_num_siblings' value on the systems with a buggy bios, which sets number of siblings to '2' even when HT is disabled. (more details are at http://bugzilla.kernel.org/show_bug.cgi?id=4359) I am planning to do more cleanup in this area (like moving smp_num_siblings to per cpuinfo) shortly. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to '')
-rw-r--r--arch/i386/kernel/smpboot.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 35bfe138cb1a..bc1bb6919e6a 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -1074,8 +1074,10 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
cpu_set(cpu, cpu_sibling_map[cpu]);
}
- if (siblings != smp_num_siblings)
+ if (siblings != smp_num_siblings) {
printk(KERN_WARNING "WARNING: %d siblings found for CPU%d, should be %d\n", siblings, cpu, smp_num_siblings);
+ smp_num_siblings = siblings;
+ }
if (c->x86_num_cores > 1) {
for (i = 0; i < NR_CPUS; i++) {