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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.
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