public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: "Paul E. McKenney" <paulmck@us.ibm.com>
To: Paul Jackson <pj@sgi.com>
Cc: ego@in.ibm.com, mingo@elte.hu, nickpiggin@yahoo.com.au,
	arjan@infradead.org, rusty@rustcorp.com.au, torvalds@osdl.org,
	akpm@osdl.org, linux-kernel@vger.kernel.org,
	arjan@intel.linux.com, davej@redhat.com, dipankar@in.ibm.com,
	vatsa@in.ibm.com, ashok.raj@intel.com
Subject: Re: [RFC][PATCH 4/4] Rename lock_cpu_hotplug/unlock_cpu_hotplug
Date: Tue, 29 Aug 2006 13:03:04 -0700	[thread overview]
Message-ID: <20060829200304.GF1290@us.ibm.com> (raw)
In-Reply-To: <20060829123102.88de61fa.pj@sgi.com>

On Tue, Aug 29, 2006 at 12:31:02PM -0700, Paul Jackson wrote:
> Paul E. McKenney wrtoe:
> > Can the locusts reasonably take a return value from the acquisition
> > primitive and feed it to the release primitive?
> 
> Yes - the locusts typically do:
> 
>     mutex_lock(&callback_mutex);
>     ... a line or two to read or write cpusets ...
>     mutex_unlock(&callback_mutex);
> 
> The lock and unlock are just a few lines apart.  I could easily pass
> a value from the lock (acquisition) to the unlock (release).
> 
> Why do you ask?

Because passing the value from the acquire to the release could remove
the need to store anything in the task structure, but allow the freedom
of implementation that would be provided by storing things in the task
structure.

Let me throw something together...

							Thanx, Paul

  reply	other threads:[~2006-08-29 20:02 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-08-24 10:34 [RFC][PATCH 4/4] Rename lock_cpu_hotplug/unlock_cpu_hotplug Gautham R Shenoy
2006-08-24 11:00 ` Arjan van de Ven
2006-08-24 14:03   ` Gautham R Shenoy
2006-08-24 14:16     ` Arjan van de Ven
2006-08-24 14:55       ` Nick Piggin
2006-08-24 15:00         ` Ingo Molnar
2006-08-24 15:53           ` Nick Piggin
2006-08-25  3:53           ` Gautham R Shenoy
2006-08-27  7:59             ` Paul Jackson
2006-08-27  8:42               ` Keith Owens
2006-08-27  9:10                 ` Paul Jackson
2006-08-29 18:05               ` Paul E. McKenney
2006-08-29 19:31                 ` Paul Jackson
2006-08-29 20:03                   ` Paul E. McKenney [this message]
2006-08-30  2:38                     ` Paul Jackson
2006-08-30 15:14                       ` Paul E. McKenney
2006-08-30 17:54                         ` Paul Jackson
2006-08-30 18:13                           ` Paul E. McKenney

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=20060829200304.GF1290@us.ibm.com \
    --to=paulmck@us.ibm.com \
    --cc=akpm@osdl.org \
    --cc=arjan@infradead.org \
    --cc=arjan@intel.linux.com \
    --cc=ashok.raj@intel.com \
    --cc=davej@redhat.com \
    --cc=dipankar@in.ibm.com \
    --cc=ego@in.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=nickpiggin@yahoo.com.au \
    --cc=pj@sgi.com \
    --cc=rusty@rustcorp.com.au \
    --cc=torvalds@osdl.org \
    --cc=vatsa@in.ibm.com \
    /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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox