All of lore.kernel.org
 help / color / mirror / Atom feed
From: Steven Rostedt <rostedt@goodmis.org>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Austin Schuh <austin@peloton-tech.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Richard Weinberger <richard.weinberger@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>,
	rt-users <linux-rt-users@vger.kernel.org>
Subject: Re: Filesystem lockup with CONFIG_PREEMPT_RT
Date: Fri, 27 Jun 2014 13:54:15 -0400	[thread overview]
Message-ID: <20140627135415.7246e87e@gandalf.local.home> (raw)
In-Reply-To: <1403890493.5830.33.camel@marge.simpson.net>

On Fri, 27 Jun 2014 19:34:53 +0200
Mike Galbraith <umgwanakikbuti@gmail.com> wrote:

> On Fri, 2014-06-27 at 10:01 -0400, Steven Rostedt wrote:
> 
> > This seems like a lot of hacks.
> 
> It is exactly that, lacking proper pooper-scooper, show rt kernel how to
> not step in it.
> 
> > I'm wondering if it would work if we
> > just have the rt_spin_lock_slowlock not call schedule(), but call
> > __schedule() directly. I mean it would keep with the mainline paradigm
> > as spinlocks don't sleep there, and one going to sleep in the -rt
> > kernel is similar to it being preempted by a very long NMI.
> 
> Problem being that we do sleep there, do need wakeup.  I have a hack
> that turns them back into spinning locks, but it.. works too :)

Why do we need the wakeup? the owner of the lock should wake it up
shouldn't it?


-- Steve

  reply	other threads:[~2014-06-27 17:54 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-14  2:29 Filesystem lockup with CONFIG_PREEMPT_RT Austin Schuh
2014-05-14  2:29 ` Austin Schuh
2014-05-21  6:23 ` Austin Schuh
2014-05-21  6:23   ` Austin Schuh
2014-05-21  7:33   ` Richard Weinberger
2014-05-21  7:33     ` Richard Weinberger
2014-06-26 19:50     ` Austin Schuh
2014-06-26 22:35       ` Thomas Gleixner
2014-06-27  0:07         ` Austin Schuh
2014-06-27  3:22           ` Mike Galbraith
2014-06-27 12:57           ` Mike Galbraith
2014-06-27 14:01             ` Steven Rostedt
2014-06-27 17:34               ` Mike Galbraith
2014-06-27 17:54                 ` Steven Rostedt [this message]
2014-06-27 18:07                   ` Mike Galbraith
2014-06-27 18:19                     ` Steven Rostedt
2014-06-27 19:11                       ` Mike Galbraith
2014-06-28  1:18                       ` Austin Schuh
2014-06-28  3:32                         ` Mike Galbraith
2014-06-28  6:20                           ` Austin Schuh
2014-06-28  7:11                             ` Mike Galbraith
2014-06-27 14:24           ` Thomas Gleixner
2014-06-28  4:51             ` Mike Galbraith
2014-07-01  0:12             ` Austin Schuh
2014-07-01  0:53               ` Austin Schuh
2014-07-05 20:26                 ` Thomas Gleixner
2014-07-06  4:55                   ` Austin Schuh
2014-07-01  3:01             ` Austin Schuh
2014-07-01 19:32               ` Austin Schuh
2014-07-03 23:08                 ` Austin Schuh
2014-07-04  4:42                   ` Mike Galbraith
2014-05-21 19:30 John Blackwood
2014-05-21 19:30 ` John Blackwood
2014-05-21 21:59 ` Austin Schuh
2014-05-21 21:59   ` Austin Schuh
2014-07-05 20:36 ` Thomas Gleixner
2014-07-05 20:36   ` Thomas Gleixner
2014-07-05 19:30 Jan de Kruyf
2014-07-07  8:48 Jan de Kruyf
2014-07-07 13:00 ` Thomas Gleixner
2014-07-07 16:23 ` Austin Schuh
2014-07-08  8:03   ` Jan de Kruyf
2014-07-08 16:09     ` Austin Schuh

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=20140627135415.7246e87e@gandalf.local.home \
    --to=rostedt@goodmis.org \
    --cc=austin@peloton-tech.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-rt-users@vger.kernel.org \
    --cc=richard.weinberger@gmail.com \
    --cc=tglx@linutronix.de \
    --cc=umgwanakikbuti@gmail.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 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.