linux-kernel - Re: [RFC] perf-cache command interface design

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Message-ID: <20141107153302.GB2137@redhat.com>
Date:	Fri, 7 Nov 2014 13:33:02 -0200
From:	Arnaldo Carvalho de Melo <acme@...hat.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Hemant Kumar <hemant@...ux.vnet.ibm.com>,
	Namhyung Kim <namhyung@...nel.org>,
	linux-kernel@...r.kernel.org, srikar@...ux.vnet.ibm.com,
	oleg@...hat.com, hegdevasant@...ux.vnet.ibm.com, mingo@...hat.com,
	systemtap@...rceware.org, aravinda@...ux.vnet.ibm.com,
	penberg@....fi, brendan.d.gregg@...il.com,
	"yrl.pp-manager.tt@...achi.com" <yrl.pp-manager.tt@...achi.com>
Subject: Re: [RFC] perf-cache command interface design

Em Fri, Nov 07, 2014 at 08:16:09AM -0700, David Ahern escreveu:
> On 11/7/14, 1:42 AM, Peter Zijlstra wrote:
> >On Fri, Nov 07, 2014 at 05:21:08PM +0900, Masami Hiramatsu wrote:
> >>The paths of buildid cache of binary/symbols are not changed.
> >
> >Could we get an option in .perfconfig to disable the buildid cache? Its
> >pointless diskspace wastage for some of us.
> 
> I was going to respond with the same. This:
> 
> [buildid]
>    # Default, disable using /dev/null
>    dir = /dev/null
> 
> disables the build-id cache. Hopefully that extends to all the other
> caches getting discussed.

I think this can even be something Kconfig'ed, and we can provide a
.config file for people like Peter that want as barebone a perf he can
get over with :-)

/me needs to try that last perf Kconfig patchkit...

- Arnaldo
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