From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f199.google.com (mail-wr0-f199.google.com [209.85.128.199]) by kanga.kvack.org (Postfix) with ESMTP id 63D3C6B0003 for ; Mon, 16 Apr 2018 12:54:54 -0400 (EDT) Received: by mail-wr0-f199.google.com with SMTP id b10so2203888wrf.3 for ; Mon, 16 Apr 2018 09:54:54 -0700 (PDT) Received: from atrey.karlin.mff.cuni.cz (atrey.karlin.mff.cuni.cz. [195.113.26.193]) by mx.google.com with ESMTPS id b97si8876987wrd.260.2018.04.16.09.54.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 16 Apr 2018 09:54:53 -0700 (PDT) Date: Mon, 16 Apr 2018 18:54:51 +0200 From: Pavel Machek Subject: Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and waiter logic to load balance console writes Message-ID: <20180416165451.GB9807@amd> References: <20180416093058.6edca0bb@gandalf.local.home> <20180416153031.GA5039@amd> <20180416155031.GX2341@sasha-vm> <20180416160608.GA7071@amd> <20180416161412.GZ2341@sasha-vm> <20180416162850.GA7553@amd> <20180416163917.GE2341@sasha-vm> <20180416164230.GA9807@amd> <20180416164514.GG2341@sasha-vm> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="VrqPEDrXMn8OVzN4" Content-Disposition: inline In-Reply-To: <20180416164514.GG2341@sasha-vm> Sender: owner-linux-mm@kvack.org List-ID: To: Sasha Levin Cc: Linus Torvalds , Steven Rostedt , Petr Mladek , "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , Cong Wang , Dave Hansen , Johannes Weiner , Mel Gorman , Michal Hocko , Vlastimil Babka , Peter Zijlstra , Jan Kara , Mathieu Desnoyers , Tetsuo Handa , Byungchul Park , Tejun Heo --VrqPEDrXMn8OVzN4 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon 2018-04-16 16:45:16, Sasha Levin wrote: > On Mon, Apr 16, 2018 at 06:42:30PM +0200, Pavel Machek wrote: > >On Mon 2018-04-16 16:39:20, Sasha Levin wrote: > >> On Mon, Apr 16, 2018 at 06:28:50PM +0200, Pavel Machek wrote: > >> > > >> >> >> Is there a reason not to take LED fixes if they fix a bug and do= n't > >> >> >> cause a regression? Sure, we can draw some arbitrary line, maybe > >> >> >> designate some subsystems that are more "important" than others,= but > >> >> >> what's the point? > >> >> > > >> >> >There's a tradeoff. > >> >> > > >> >> >You want to fix serious bugs in stable, and you really don't want > >> >> >regressions in stable. And ... stable not having 1000s of patches > >> >> >would be nice, too. > >> >> > >> >> I don't think we should use a number cap here, but rather look at t= he > >> >> regression rate: how many patches broke something? > >> >> > >> >> Since the rate we're seeing now with AUTOSEL is similar to what we = were > >> >> seeing before AUTOSEL, what's the problem it's causing? > >> > > >> >Regression rate should not be the only criteria. > >> > > >> >More patches mean bigger chance customer's patches will have a > >> >conflict with something in -stable, for example. > >> > >> Out of tree patches can't be a consideration here. There are no > >> guarantees for out of tree code, ever. > > > >Out of tree code is not consideration for mainline, agreed. Stable > >should be different. >=20 > This is a discussion we could have with in right forum, but FYI stable > doesn't even guarantee KABI compatibility between minor versions at this > point. Stable should be useful base for distributions. They carry out of tree patches, and yes, you should try to make their lives easy. Pavel --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --VrqPEDrXMn8OVzN4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlrU1VsACgkQMOfwapXb+vLrpACfZfYG+++ePuNgKiIufAF8pCZk cXAAn217Ofaj72rXdJQjIhhz7la4TSsT =YGfb -----END PGP SIGNATURE----- --VrqPEDrXMn8OVzN4--