| commit | cd1f11de69226cc7ce7e7f22bdab9010103ddaa6 | [log] [tgz] |
|---|---|---|
| author | Andi Kleen <ak@linux.intel.com> | Fri Mar 20 10:11:24 2015 -0700 |
| committer | Ingo Molnar <mingo@kernel.org> | Thu Apr 02 17:33:20 2015 +0200 |
| tree | 6543b48a8b40ab87617790a9a40a5cc52ea1828b | |
| 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>