linux-kernel - Re: [perf] exporting perf_pmu

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] [day] [month] [year] [list]

Date:	Wed, 6 Jun 2012 10:30:32 -0400
From:	Vince Weaver <vweaver1@...s.utk.edu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	<linux-kernel@...r.kernel.org>, <mingo@...e.hu>,
	<paulus@...ba.org>, <acme@...stprotocols.net>
Subject: Re: [perf] exporting perf_pmu_register?

On Wed, 6 Jun 2012, Peter Zijlstra wrote:

> On Thu, 2012-03-15 at 17:41 -0400, Vince Weaver wrote:
> > Would a patch similar to
> >   https://lkml.org/lkml/2010/8/18/64
> > be accepted that exported this?
> > 
> If it comes with a patch that uses the exports, sure.
> 

while I understand the logic behind that from a kernel-developer 
perspective, it does make things harder in the real world.

In the end PAPI has implemented RAPL support via reading /dev/cpu/*/msr
because it was easier to convince our sysadmin to give us read-only 
permission to /dev/cpu/*/msr than to take our in-production Sandybridge-EP 
system and patch it up to export perf_pmu_register so we could work on a 
proper driver.

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/