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| author | Yazen Ghannam <Yazen.Ghannam@amd.com> | 2016-07-08 09:09:39 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-07-08 09:29:26 (GMT) |
| commit | 340e983ab8afd02b59d698dd1365d7773bf136b3 (patch) | |
| tree | 70ea850331c7285b7672ea13488c78e487e6ed43 /tools/perf/util/debug.h | |
| parent | 955d1427a91b18f53e082bd7c19c40ce13b0a0f4 (diff) | |
| download | linux-340e983ab8afd02b59d698dd1365d7773bf136b3.tar.xz | |
x86/RAS/AMD: Reduce the number of IPIs when prepping error injection
We currently use wrmsr_on_cpu() 4 times when prepping for an error
injection. This will generate 4 IPIs for each MSR write. We can reduce
the number of IPIs to 1 by grouping the MSR writes and executing them
serially on the appropriate CPU.
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1467968983-4874-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/util/debug.h')
0 files changed, 0 insertions, 0 deletions