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From: Sasha Levin <Alexander.Levin@microsoft.com>
To: Daniel Wang <wonderfly@google.com>
Cc: "rostedt@goodmis.org" <rostedt@goodmis.org>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>,
	"pmladek@suse.com" <pmladek@suse.com>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"byungchul.park@lge.com" <byungchul.park@lge.com>,
	"dave.hansen@intel.com" <dave.hansen@intel.com>,
	"hannes@cmpxchg.org" <hannes@cmpxchg.org>,
	"jack@suse.cz" <jack@suse.cz>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"mathieu.desnoyers@efficios.com" <mathieu.desnoyers@efficios.com>,
	"mgorman@suse.de" <mgorman@suse.de>,
	"mhocko@kernel.org" <mhocko@kernel.org>,
	"pavel@ucw.cz" <pavel@ucw.cz>,
	"penguin-kernel@i-love.sakura.ne.jp" 
	<penguin-kernel@i-love.sakura.ne.jp>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"tj@kernel.org" <tj@kernel.org>,
	"torvalds@linux-foundation.org" <torvalds@linux-foundation.org>,
	"vbabka@suse.cz" <vbabka@suse.cz>,
	"xiyou.wangcong@gmail.com" <xiyou.wangcong@gmail.com>,
	Peter Feiner <pfeiner@google.com>
Subject: Re: 4.14 backport request for dbdda842fe96f: "printk: Add console owner and waiter logic to load balance console writes"
Date: Mon, 1 Oct 2018 20:40:24 +0000	[thread overview]
Message-ID: <20181001204022.GE69414@sasha-vm> (raw)
In-Reply-To: <CAJmjG29Jwn_1E5zexcm8eXTG=cTWyEr1gjSfSAS2fueB_V0tfg@mail.gmail.com>

On Mon, Oct 01, 2018 at 01:37:30PM -0700, Daniel Wang wrote:
>On Mon, Oct 1, 2018 at 12:23 PM Steven Rostedt <rostedt@goodmis.org> wrote:
>>
>> > Serial console logs leading up to the deadlock. As can be seen the stack trace
>> > was incomplete because the printing path hit a timeout.
>>
>> I'm fine with having this backported.
>
>Thanks. I can send the cherrypicks your way. Do you recommend that I
>include the three follow-up fixes though?
>
>c14376de3a1b printk: Wake klogd when passing console_lock owner
>fd5f7cde1b85 printk: Never set console_may_schedule in console_trylock()
>c162d5b4338d printk: Hide console waiter logic into helpers
>dbdda842fe96 printk: Add console owner and waiter logic to load
>balance console writes

Maybe it'll also make sense to make the reproducer into a test that can
go under tools/testing/ and we can backport that as well? It'll be
helpful to have a way to make sure things are sane.

--
Thanks,
Sasha

  reply	other threads:[~2018-10-01 20:40 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-27 19:46 4.14 backport request for dbdda842fe96f: "printk: Add console owner and waiter logic to load balance console writes" Daniel Wang
2018-10-01 19:23 ` Steven Rostedt
2018-10-01 20:13   ` Pavel Machek
2018-10-01 20:21     ` Vlastimil Babka
2018-10-01 20:38       ` Daniel Wang
2018-10-01 20:29     ` Steven Rostedt
2018-10-01 20:37   ` Daniel Wang
2018-10-01 20:40     ` Sasha Levin [this message]
2018-10-01 20:40       ` Sasha Levin
2018-10-02  8:42     ` Petr Mladek
2018-10-02 17:21       ` Daniel Wang
2018-10-03  0:15       ` Daniel Wang
2018-10-03  1:23         ` Steven Rostedt
2018-10-03  9:14           ` Petr Mladek
2018-10-03 17:16             ` Daniel Wang
2018-10-03 17:37               ` Steven Rostedt
2018-10-03 18:37                 ` Daniel Wang
2018-10-03 23:37                   ` Daniel Wang
2018-10-04  7:44                   ` Sergey Senozhatsky
2018-10-04  8:05                     ` Sergey Senozhatsky
2018-10-04  8:36                     ` Petr Mladek
2018-10-04  8:55                       ` Sergey Senozhatsky
2018-10-04  8:55                         ` Sergey Senozhatsky
2018-10-21 18:09                         ` Daniel Wang
2018-10-22  9:32                           ` Petr Mladek
2018-10-22 10:09                           ` Sergey Senozhatsky
2018-11-01 16:05                             ` Daniel Wang
2018-11-09  6:47                               ` Sergey Senozhatsky
2018-12-12  1:16                                 ` Daniel Wang
2018-12-12  5:21                                   ` Sergey Senozhatsky
2018-12-12  6:08                                     ` Daniel Wang
2018-12-12  6:28                                       ` Sergey Senozhatsky
2018-12-12  6:48                                         ` Sasha Levin
2018-12-12  8:10                                           ` Sergey Senozhatsky
2018-12-12 13:36                                             ` Petr Mladek
2018-12-12 13:59                                               ` Sergey Senozhatsky
2018-12-12 17:43                                                 ` Sasha Levin
2018-12-12 20:11                                                   ` Daniel Wang
2018-12-12 21:43                                                     ` Sasha Levin
2018-12-12 21:49                                                       ` Daniel Wang
2018-12-12 21:52                                                         ` Sasha Levin
2018-12-12 21:56                                                           ` Daniel Wang
2018-12-13  0:40                                                             ` Daniel Wang
2018-12-13  2:27                                                               ` Sergey Senozhatsky
2018-12-13  2:39                                                                 ` Daniel Wang
2018-12-13  9:59                                                                   ` Petr Mladek
2018-12-13 14:29                                                                     ` Sasha Levin
2018-12-13  2:07                                                           ` Sergey Senozhatsky
2018-12-28  0:16                                             ` Sergey Senozhatsky
2018-12-28  8:27                                               ` Greg KH
2018-12-28 22:03                                                 ` Daniel Wang
2018-12-28 22:03                                                   ` Daniel Wang
2018-12-30  3:03                                                   ` Sergey Senozhatsky
2018-10-04  7:49                 ` Petr Mladek
2018-10-02  8:16 ` Sergey Senozhatsky

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