linux-kernel - Re: [PATCH tip/core/rcu 0/6] rcu: fix synchronize_rcu

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] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 15 Oct 2009 02:35:41 -0700
From:	Josh Triplett <josh@...htriplett.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	dipankar@...ibm.com, akpm@...ux-foundation.org,
	mathieu.desnoyers@...ymtl.ca, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com, npiggin@...e.de,
	jens.axboe@...cle.com
Subject: Re: [PATCH tip/core/rcu 0/6] rcu: fix synchronize_rcu_expedited(),
 update docs, improve perf

On Thu, Oct 15, 2009 at 11:21:55AM +0200, Ingo Molnar wrote:
> * Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:
> 
> > This patchset contains a bug fix, a performance improvement, and 
> > documentation updates:
> > 
> > o	Update Documentation/RCU/trace.txt to reflect recent changes
> > 	(including the removal of rcupreempt.c).
> 
> i've applied this to the .33 queue.

I realize this only represents a documentation change, but it updates
the documentation to match the code in 2.6.32, which seems worth doing.

> > o	Add the new rnp->blocked_tasks field to the rcuhier trace file
> > 	in debugfs.
> > 
> > o	Update the Documentation/RCU/trace.txt documentation to include
> > 	the rnp->blocked_tasks tracing.
> 
> i've applied these to the .33 queue as well. (both tracing and 
> documentation is not urgent material.) I also did minor edits to the 
> changelogs.

Those who debug RCU-related issues would disagree that having adequate
tracing information proves non-urgent. :) The tracing information this
adds proves essential for debugging issues with the new hierarchical
RCU.  (And the documentation patch just documents the added tracing
information, so both should go together as a unit; actually, perhaps
they should get merged.)

- Josh Triplett
--
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/