From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Daniel Walker <dwalker@mvista.com>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Jason Baron <jbaron@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 3/5] lockstat: core infrastructure
Date: Fri, 1 Jun 2007 20:51:23 +0200 [thread overview]
Message-ID: <20070601185123.GA5129@elte.hu> (raw)
In-Reply-To: <1180723421.5676.8.camel@lappy>
* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> On Fri, 2007-06-01 at 09:11 -0700, Daniel Walker wrote:
> > On Fri, 2007-06-01 at 17:52 +0200, Peter Zijlstra wrote:
>
> > > The whole issue is that you don't have any control over what clocksource
> > > you'll end up with. If it so happens that pmtimer gets selected your
> > > whole box will crawl if its used liberaly, like the patch under
> > > discussion does.
> >
> > You can have control over it, which I think the whole point of this
> > discussion ..
>
> No you don't, clocksource will gladly discard the TSC when its not
> found stable enough (the majority of the systems today). While it
> would be good enough for sched_clock().
yeah, precisely. [ There is another thing as well: most embedded
architectures do not even implement LOCKDEP_SUPPORT today, so it wouldnt
be possible to enable lockstat on them anyway. So this whole topic is
ridiculous to begin with. How about fixing some real, non-imaginery bugs
instead? ;-) ]
Ingo
next prev parent reply other threads:[~2007-06-01 18:51 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-29 12:52 [PATCH 0/5] lock contention tracking -v3 Peter Zijlstra
2007-05-29 12:52 ` [PATCH 1/5] fix raw_spinlock_t vs lockdep Peter Zijlstra
2007-05-29 12:52 ` [PATCH 2/5] lockdep: sanitise CONFIG_PROVE_LOCKING Peter Zijlstra
2007-05-29 13:21 ` Christoph Hellwig
2007-05-29 14:16 ` Ingo Molnar
2007-05-30 3:14 ` Andrew Morton
2007-05-29 12:52 ` [PATCH 3/5] lockstat: core infrastructure Peter Zijlstra
2007-05-29 20:28 ` Daniel Walker
2007-05-30 13:03 ` Peter Zijlstra
2007-05-30 13:24 ` Ingo Molnar
2007-05-30 13:40 ` Steven Rostedt
2007-05-30 13:49 ` Ingo Molnar
2007-05-30 17:06 ` Daniel Walker
2007-05-30 17:16 ` Peter Zijlstra
2007-05-30 17:25 ` Daniel Walker
2007-06-01 13:12 ` Ingo Molnar
2007-06-01 15:26 ` Daniel Walker
2007-06-01 15:52 ` Peter Zijlstra
2007-06-01 16:11 ` Daniel Walker
2007-06-01 18:30 ` Ingo Molnar
2007-06-01 19:25 ` Matt Mackall
2007-06-01 19:30 ` Daniel Walker
2007-06-01 18:43 ` Peter Zijlstra
2007-06-01 18:51 ` Ingo Molnar [this message]
2007-06-01 19:30 ` Daniel Walker
2007-06-01 18:19 ` Ingo Molnar
2007-06-01 19:30 ` Daniel Walker
2007-06-01 14:25 ` Andi Kleen
2007-05-30 15:20 ` Daniel Walker
2007-05-30 3:43 ` Andrew Morton
2007-05-29 12:52 ` [PATCH 4/5] lockstat: human readability tweaks Peter Zijlstra
2007-05-29 12:52 ` [PATCH 5/5] lockstat: hook into spinlock_t, rwlock_t, rwsem and mutex Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20070601185123.GA5129@elte.hu \
--to=mingo@elte.hu \
--cc=a.p.zijlstra@chello.nl \
--cc=akpm@linux-foundation.org \
--cc=dwalker@mvista.com \
--cc=jbaron@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rostedt@goodmis.org \
--cc=tglx@linutronix.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.