linux-kernel - Re: [PATCH 06/12] perf/x86-ibs: Precise event sampling with IBS for AMD CPUs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1335540635.2463.134.camel@laptop>
Date:	Fri, 27 Apr 2012 17:30:35 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Robert Richter <robert.richter@....com>
Cc:	Stephane Eranian <eranian@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/12] perf/x86-ibs: Precise event sampling with IBS
 for AMD CPUs

On Fri, 2012-04-27 at 17:18 +0200, Robert Richter wrote:
> There is nothing wrong with it. I already implemented that the
> MISC_EXACT flag is supported. But, the flag is basically not used in
> the perf tool and there is no modifier or so to only get a precise
> rip. 

Just because userspace doesn't dtrt doesnt mean its a good idea to wreck
the kernel side of things.

Instead fix the userspace.

I'll simply not take patches that silently drops samples.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/