diff options
| author | Andi Kleen <ak@linux.intel.com> | 2015-03-20 13:11:24 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-02 11:33:20 -0400 |
| commit | cd1f11de69226cc7ce7e7f22bdab9010103ddaa6 (patch) | |
| tree | 6543b48a8b40ab87617790a9a40a5cc52ea1828b /README | |
| parent | 1a78d93750bb5f61abdc59a91fc3bd06a214542a (diff) | |
perf/x86/intel: Avoid rewriting DEBUGCTL with the same value for LBRs
perf with LBRs on has a tendency to rewrite the DEBUGCTL MSR with
the same value. Add a little optimization to skip the unnecessary
write.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1426871484-21285-2-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions