Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756447AbaKSUoA (ORCPT ); Wed, 19 Nov 2014 15:44:00 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:55635 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755821AbaKSUn7 (ORCPT ); Wed, 19 Nov 2014 15:43:59 -0500 Date: Wed, 19 Nov 2014 12:43:58 -0800 From: Greg Kroah-Hartman To: "Paul E. McKenney" , Chuck Ebbert Cc: Frederic Weisbecker , Henrique de Moraes Holschuh , linux-kernel@vger.kernel.org, stable@kernel.org Subject: Re: [PATCH 3.17 00/25] 3.17.1-stable review Message-ID: <20141119204358.GA10165@kroah.com> References: <20141013022454.289398272@linuxfoundation.org> <20141013112834.GA10826@khazad-dum.debian.net> <20141013082319.175d90bb@as> <20141119172235.GA31260@kroah.com> <20141119194414.GN5050@linux.vnet.ibm.com> <20141119201648.GA22775@kroah.com> <20141119203512.GQ5050@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141119203512.GQ5050@linux.vnet.ibm.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 19, 2014 at 12:35:12PM -0800, Paul E. McKenney wrote: > On Wed, Nov 19, 2014 at 12:16:48PM -0800, Greg Kroah-Hartman wrote: > > On Wed, Nov 19, 2014 at 11:44:14AM -0800, Paul E. McKenney wrote: > > > On Wed, Nov 19, 2014 at 09:22:35AM -0800, Greg Kroah-Hartman wrote: > > > > On Mon, Oct 13, 2014 at 08:23:19AM -0500, Chuck Ebbert wrote: > > > > > On Mon, 13 Oct 2014 08:28:35 -0300 > > > > > Henrique de Moraes Holschuh wrote: > > > > > > > > > > > On Mon, 13 Oct 2014, Greg Kroah-Hartman wrote: > > > > > > > This is the start of the stable review cycle for the 3.17.1 > > > > > > > release. There are 25 patches in this series, all will be posted > > > > > > > as a response to this one. If anyone has any issues with these > > > > > > > being applied, please let me know. > > > > > > > > > > > > Actually, 3.17 is a filesystem killer for some unlucky users due to > > > > > > the libata blacklist being disabled by a bug. > > > > > > > > > > > > Patch: > > > > > > https://git.kernel.org/cgit/linux/kernel/git/tj/libata.git/patch/?id=1c40279960bcd7d52dbdf1d466b20d24b99176c8 > > > > > > 1c40279960bcd7d52dbdf1d466b20d24b99176c8 (libata: Un-break ATA > > > > > > blacklist) > > > > > > > > > > > > > > > > There are some more bugs too: > > > > > > > > > > > > > > > RCU stalls, fix has been in rcu/urgent for 7 days: > > > > > https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git/commit/?h=rcu/urgent&id=789cbbeca4eb7141cbd748ee93772471101b507b > > > > > > > > Doesn't build in 3.17 properly :( > > > > > > > > > blk-mq bio merging (still no good fix available): > > > > > https://lkml.org/lkml/2014/10/9/729 > > > > > (The fix sitting in the block tree: > > > > > https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git/commit/?h=for-3.18/core&id=764f612c6c3c231b9c12cfae7c328ccc9c453258 > > > > > is wrong according to that message.) > > > > > > > > Did this ever get resolved? > > > > > > > > > Stalls when using nohz, requires series of six patches to fix that > > > > > didn't make 3.17 and weren't marked for -stable: > > > > > > > > > > From a80e49e2cc3145af014a8ae44f575829cc236192 Mon Sep 17 00:00:00 2001 > > > > > From: Frederic Weisbecker > > > > > Subject: nohz: Move nohz full init call to tick init > > > > > > > > > > From c5c38ef3d70377dc504a6a3f611a3ec814bc757b Mon Sep 17 00:00:00 2001 > > > > > From: Peter Zijlstra > > > > > Subject: irq_work: Introduce arch_irq_work_has_interrupt() > > > > > > > > > > From 76a33061b9323b7fdb220ae5fa116c10833ec22e Mon Sep 17 00:00:00 2001 > > > > > From: Frederic Weisbecker > > > > > Subject: irq_work: Force raised irq work to run on irq work interrupt > > > > > > > > > > From 3010279f0fc36f0388872203e63ca49912f648fd Mon Sep 17 00:00:00 2001 > > > > > From: Frederic Weisbecker > > > > > Subject: x86: Tell irq work about self IPI support > > > > > > > > > > From 09f6edd424218eb69078551b2ecfada1f2d098eb Mon Sep 17 00:00:00 2001 > > > > > From: Frederic Weisbecker > > > > > Subject: arm: Tell irq work about self IPI support > > > > > > > > > > From 3631073659d0aafeaa52227bb61a100efaf901dc Mon Sep 17 00:00:00 2001 > > > > > From: Frederic Weisbecker > > > > To: 09f6edd424218eb69078551b2ecfada1f2d098eb > > > > To: Chuck Ebbert > > > > Cc: Henrique de Moraes Holschuh , > > > > linux-kernel@vger.kernel.org, stable@kernel.org > > > > Bcc: > > > > Subject: Re: [PATCH 3.17 00/25] 3.17.1-stable review > > > > Reply-To: > > > > In-Reply-To: <20141013082319.175d90bb@as> > > > > > > > > On Mon, Oct 13, 2014 at 08:23:19AM -0500, Chuck Ebbert wrote: > > > > > On Mon, 13 Oct 2014 08:28:35 -0300 > > > > > Henrique de Moraes Holschuh wrote: > > > > > > > > > > > On Mon, 13 Oct 2014, Greg Kroah-Hartman wrote: > > > > > > > This is the start of the stable review cycle for the 3.17.1 > > > > > > > release. There are 25 patches in this series, all will be posted > > > > > > > as a response to this one. If anyone has any issues with these > > > > > > > being applied, please let me know. > > > > > > > > > > > > Actually, 3.17 is a filesystem killer for some unlucky users due to > > > > > > the libata blacklist being disabled by a bug. > > > > > > > > > > > > Patch: > > > > > > https://git.kernel.org/cgit/linux/kernel/git/tj/libata.git/patch/?id=1c40279960bcd7d52dbdf1d466b20d24b99176c8 > > > > > > 1c40279960bcd7d52dbdf1d466b20d24b99176c8 (libata: Un-break ATA > > > > > > blacklist) > > > > > > > > > > > > > > > > There are some more bugs too: > > > > > > > > > > > > > > > RCU stalls, fix has been in rcu/urgent for 7 days: > > > > > https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git/commit/?h=rcu/urgent&id=789cbbeca4eb7141cbd748ee93772471101b507b > > > > > > > > Doesn't build in 3.17 properly :( > > > > > > Older kernels can use rcu_note_context_switch() instead of > > > rcu_note_voluntary_context_switch(), which didn't show up until quite > > > recently. Please note that rcu_note_context_switch() is quite a bit > > > more heavy-weight than is rcu_note_voluntary_context_switch(), but it > > > should be OK in this context. > > > > "OK" as in "worth the overhead to fix the known bug"? Or is this just > > not worth backporting to 3.17, 3.14, and 3.10 as no one really hits this > > issue there? > > "OK" as in "the added overhead of rcu_note_context_switch() is likely > to be down in the noise in this case". I must confess that I have no > idea whether or not people hit this issue in 3.17, 3.14, or 3.10. Ah, if no one has noticed this in older kernels, I'm not about to backport it :) Chuck, why do you think this needs to be in 3.17? And if so there, do you think it also needs to be in older kernel trees as well? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/