[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Fri, 7 Jul 2017 13:23:12 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
David Laight <David.Laight@...LAB.COM>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"oleg@...hat.com" <oleg@...hat.com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"mingo@...hat.com" <mingo@...hat.com>,
"dave@...olabs.net" <dave@...olabs.net>,
"manfred@...orfullife.com" <manfred@...orfullife.com>,
"tj@...nel.org" <tj@...nel.org>, "arnd@...db.de" <arnd@...db.de>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
"will.deacon@....com" <will.deacon@....com>,
"stern@...land.harvard.edu" <stern@...land.harvard.edu>,
"parri.andrea@...il.com" <parri.andrea@...il.com>,
"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v2 0/9] Remove spin_unlock_wait()
On Fri, Jul 07, 2017 at 12:33:49PM +0200, Ingo Molnar wrote:
> [1997/04] v2.1.36:
>
> the spin_unlock_wait() primitive gets introduced as part of release()
Whee, that goes _way_ further back than I thought it did :-)
> [2017/07] v4.12:
>
> wait_task_inactive() is still alive and kicking. Its poll loop has
> increased in complexity, but it still does not use spin_unlock_wait()
>
I've tried 'fixing' that wait_task_inactive() thing a number of times,
but always failed :/ That is very nasty code indeed.
Powered by blists - more mailing lists