linux-kernel - Re: [PATCH 01/10] perf,x86: Fix event/group validation

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: <CABPqkBTvAd3RAp2AuM6DUMk4-dKs6cAXOt-Ewfw58DodmTtU4Q@mail.gmail.com>
Date:	Thu, 21 May 2015 06:27:17 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	Jiri Olsa <jolsa@...hat.com>,
	"Liang, Kan" <kan.liang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Hunter <ahh@...gle.com>,
	Maria Dimakopoulou <maria.n.dimakopoulou@...il.com>
Subject: Re: [PATCH 01/10] perf,x86: Fix event/group validation

On Thu, May 21, 2015 at 6:20 AM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Thu, May 21, 2015 at 06:18:15AM -0700, Stephane Eranian wrote:
>> Yes, it does modify the cpuc->event_list[]->hwc, because it is used as a
>> cache for *EACH* invocation of the function. It is irrelevant outside the
>> function.
>
> Yes, but the problem is that they _nest_.
>
> So you get to use the one from the nested call in the outer call.

You mean x86_schedule_events() calls x86_schedule_events()?
Or are you talking about a preemption while executing x86_schedule_events()?
--
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/