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| author | Shai Fultheim <shai@scalemp.com> | 2012-04-20 01:09:11 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-07 15:27:37 +0200 |
| commit | ddc5681ed33a279fdc188e98e71f0c539f08c6e6 (patch) | |
| tree | e8c70c59ed3c4c0a466e39e0a3cc26e7fe991351 /Makefile | |
| parent | febb72a6e4cc6c8cffcc1ea649a3fb364f1ea432 (diff) | |
| download | lwn-ddc5681ed33a279fdc188e98e71f0c539f08c6e6.tar.gz lwn-ddc5681ed33a279fdc188e98e71f0c539f08c6e6.zip | |
x86/cache_info: Fix setup of l2/l3 ids
On some architectures (such as vSMP), it is possible to have
CPUs with a different number of cores sharing the same cache.
The current implementation implicitly assumes that all CPUs will
have the same number of cores sharing caches, and as a result,
different CPUs can end up with the same l2/l3 ids.
Fix this by masking out the shared cache bits, instead of
shifting the APICID. By doing so, it is guaranteed that the
generated cache ids are always unique.
Signed-off-by: Shai Fultheim <shai@scalemp.com>
[ rebased, simplified, and reworded the commit message]
Signed-off-by: Ido Yariv <ido@wizery.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Mike Travis <travis@sgi.com>
Cc: Dave Jones <davej@redhat.com>
Link: http://lkml.kernel.org/r/1334873351-31142-1-git-send-email-ido@wizery.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions