linux-kernel - Re: [PATCH v9 12/12] kthread: Better support freezable kthread workers

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Message-ID: <20160620203002.GD3262@mtj.duckdns.org>
Date:	Mon, 20 Jun 2016 16:30:02 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Petr Mladek <pmladek@...e.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Josh Triplett <josh@...htriplett.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jiri Kosina <jkosina@...e.cz>, Borislav Petkov <bp@...e.de>,
	Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org,
	Vlastimil Babka <vbabka@...e.cz>, linux-api@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 12/12] kthread: Better support freezable kthread
 workers

On Thu, Jun 16, 2016 at 01:17:31PM +0200, Petr Mladek wrote:
> This patch allows to make kthread worker freezable via a new @flags
> parameter. It will allow to avoid an init work in some kthreads.
> 
> It currently does not affect the function of kthread_worker_fn()
> but it might help to do some optimization or fixes eventually.
> 
> I currently do not know about any other use for the @flags
> parameter but I believe that we will want more flags
> in the future.
> 
> Finally, I hope that it will not cause confusion with @flags member
> in struct kthread. Well, I guess that we will want to rework the
> basic kthreads implementation once all kthreads are converted into
> kthread workers or workqueues. It is possible that we will merge
> the two structures.
> 
> Signed-off-by: Petr Mladek <pmladek@...e.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun