From: Peter Zijlstra <peterz@infradead.org>
To: kan.liang@intel.com
Cc: eranian@google.com, andi@firstfloor.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] perf/x86: filter branches for PEBS event
Date: Fri, 27 Mar 2015 13:17:42 +0100 [thread overview]
Message-ID: <20150327121742.GE23123@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <1427393603-3533-1-git-send-email-kan.liang@intel.com>
On Thu, Mar 26, 2015 at 02:13:23PM -0400, kan.liang@intel.com wrote:
> This patch move intel_shared_regs_constraints for branch_reg ahead of
> intel_pebs_constraints.
Why not all shared regs?
> intel_shared_regs_constraints for branch_reg doesn't modify event->hw,
> so it's safe to be called before intel_pebs_constraints.
> intel_shared_regs_constraints for branch_reg also special case when it
> returns &emptyconstraint. It put constraints for extra_reg. This patch
> remove it. Because it will never get constraints for extra_reg if return
> is &emptyconstraint.
-ENOPARSE.
next prev parent reply other threads:[~2015-03-27 12:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-26 18:13 [PATCH 1/1] perf/x86: filter branches for PEBS event kan.liang
2015-03-26 19:40 ` Stephane Eranian
2015-03-26 20:20 ` Liang, Kan
2015-03-26 21:02 ` Stephane Eranian
2015-03-27 12:10 ` Peter Zijlstra
2015-03-27 15:28 ` Stephane Eranian
2015-03-27 12:17 ` Peter Zijlstra [this message]
2015-03-27 13:09 ` Liang, Kan
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