References: <20120607071531.GA4849@quad> <4FD78BE6.4060207@zytor.com> <20120612190720.GA11137@aftab.osrc.amd.com> <1339529614.31548.104.camel@twins> <20120612194900.GC11137@aftab.osrc.amd.com> <4FD7A687.3040500@zytor.com> <20120612203730.GE11137@aftab.osrc.amd.com> <4FD7A99F.8030007@zytor.com> <1339591173.8980.23.camel@twins>
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Subject: Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Wed, 13 Jun 2012 06:22:22 -0700
To: Peter Zijlstra <peterz@infradead.org>
CC: Borislav Petkov <bp@amd64.org>, Stephane Eranian <eranian@google.com>,
        linux-kernel@vger.kernel.org, andi@firstfloor.org, mingo@elte.hu,
        ming.m.lin@intel.com, "Yu, Fenghua" <fenghua.yu@intel.com>
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I don't remember the exact details of the old interface but yes... seems like every "improvement" has just made it a worse mess.

Peter Zijlstra <peterz@infradead.org> wrote:

>On Tue, 2012-06-12 at 13:42 -0700, H. Peter Anvin wrote:
>> And yes, I would prefer a single sysfs file,
>> or better yet a plain old device node. 
>
>So how about we rip out all this sysfs crap and go back to
>MICROCODE_OLD_INTERFACE ? Afaict that's relatively sane.

-- 
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