linux-kernel - Re: [PATCH 1/3] perf: disable sampled events if no PMU interrupt

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: <alpine.DEB.2.10.1405200917060.18606@vincent-weaver-1.umelst.maine.edu>
Date:	Tue, 20 May 2014 09:19:27 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Will Deacon <will.deacon@....com>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 1/3] perf: disable sampled events if no PMU interrupt

On Tue, 20 May 2014, Peter Zijlstra wrote:

> > +#define PERF_PMU_NO_INTERRUPT		1
> 
> Are you ok with me making that:
> 
> #define PERF_PMU_CAP_NO_INTERRUPT		0x01

sounds good.  All my recent fuzzing has made me paranoid enough to 
double check that yes indeed we don't need to slap an ULL on the end of 
that.

Though I hope 32-bits is enough for this, I feel like we've just added the 
feature and suddenly all kinds of uses are coming out of the woodwork.

Vince
--
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/