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| author |   Siddha, Suresh B <suresh.b.siddha@intel.com> | 2005-05-27 12:53:01 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-28 11:14:00 -0700 |
| commit | 49f384b82b03416dd7e4fc77847a959fe3247362 (patch) | |
| tree | ed1aa19960c663a43de0eb17df4a83825dcd5206 /arch/i386 | |
| parent | [PATCH] drop note_interrupt() for per-CPU for proper scaling (diff) | |
| download | linux-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 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/smpboot.c | 4 |
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++) { |