From: Davidlohr Bueso <dave@stgolabs.net>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, Kan Liang <kan.liang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>, Jan Kara <jack@suse.cz>,
linux-mm <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] sched/wait: Break up long wake list walk
Date: Tue, 15 Aug 2017 15:47:28 -0700 [thread overview]
Message-ID: <20170815224728.GA1373@linux-80c1.suse> (raw)
In-Reply-To: <CA+55aFw1A1C8qUeKPUzACrsqn97UDxTP3M2SRs80aEztfU=Qbg@mail.gmail.com>
On Mon, 14 Aug 2017, Linus Torvalds wrote:
>On Mon, Aug 14, 2017 at 8:15 PM, Andi Kleen <ak@linux.intel.com> wrote:
>> But what should we do when some other (non page) wait queue runs into the
>> same problem?
>
>Hopefully the same: root-cause it.
Or you can always use wake_qs; which exists _exactly_ for the issues you
are running into. Note that Linus does not want them in general wait:
https://lkml.org/lkml/2017/7/7/605
... but you can always use them on your own if you really need to (ie locks,
ipc, etc).
Thanks,
Davidlohr
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WARNING: multiple messages have this Message-ID (diff)
From: Davidlohr Bueso <dave@stgolabs.net>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>, Kan Liang <kan.liang@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>, Jan Kara <jack@suse.cz>,
linux-mm <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] sched/wait: Break up long wake list walk
Date: Tue, 15 Aug 2017 15:47:28 -0700 [thread overview]
Message-ID: <20170815224728.GA1373@linux-80c1.suse> (raw)
In-Reply-To: <CA+55aFw1A1C8qUeKPUzACrsqn97UDxTP3M2SRs80aEztfU=Qbg@mail.gmail.com>
On Mon, 14 Aug 2017, Linus Torvalds wrote:
>On Mon, Aug 14, 2017 at 8:15 PM, Andi Kleen <ak@linux.intel.com> wrote:
>> But what should we do when some other (non page) wait queue runs into the
>> same problem?
>
>Hopefully the same: root-cause it.
Or you can always use wake_qs; which exists _exactly_ for the issues you
are running into. Note that Linus does not want them in general wait:
https://lkml.org/lkml/2017/7/7/605
... but you can always use them on your own if you really need to (ie locks,
ipc, etc).
Thanks,
Davidlohr
next prev parent reply other threads:[~2017-08-15 22:47 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-15 0:52 [PATCH 1/2] sched/wait: Break up long wake list walk Tim Chen
2017-08-15 0:52 ` Tim Chen
2017-08-15 0:52 ` [PATCH 2/2] sched/wait: Introduce lock breaker in wake_up_page_bit Tim Chen
2017-08-15 0:52 ` Tim Chen
2017-08-15 1:48 ` [PATCH 1/2] sched/wait: Break up long wake list walk Linus Torvalds
2017-08-15 1:48 ` Linus Torvalds
2017-08-15 2:27 ` Andi Kleen
2017-08-15 2:27 ` Andi Kleen
2017-08-15 2:52 ` Linus Torvalds
2017-08-15 2:52 ` Linus Torvalds
2017-08-15 3:15 ` Andi Kleen
2017-08-15 3:15 ` Andi Kleen
2017-08-15 3:28 ` Linus Torvalds
2017-08-15 3:28 ` Linus Torvalds
2017-08-15 19:05 ` Tim Chen
2017-08-15 19:05 ` Tim Chen
2017-08-15 19:41 ` Linus Torvalds
2017-08-15 19:41 ` Linus Torvalds
2017-08-15 19:47 ` Linus Torvalds
2017-08-15 19:47 ` Linus Torvalds
2017-08-15 22:47 ` Davidlohr Bueso [this message]
2017-08-15 22:47 ` Davidlohr Bueso
2017-08-15 22:56 ` Linus Torvalds
2017-08-15 22:56 ` Linus Torvalds
2017-08-15 22:57 ` Linus Torvalds
2017-08-15 22:57 ` Linus Torvalds
2017-08-15 23:50 ` Linus Torvalds
2017-08-15 23:50 ` Linus Torvalds
2017-08-16 23:22 ` Eric W. Biederman
2017-08-16 23:22 ` Eric W. Biederman
2017-08-17 16:17 ` Liang, Kan
2017-08-17 16:17 ` Liang, Kan
2017-08-17 16:25 ` Linus Torvalds
2017-08-17 16:25 ` Linus Torvalds
2017-08-17 20:18 ` Liang, Kan
2017-08-17 20:44 ` Linus Torvalds
2017-08-17 20:44 ` Linus Torvalds
2017-08-18 12:23 ` Mel Gorman
2017-08-18 12:23 ` Mel Gorman
2017-08-18 14:20 ` Liang, Kan
2017-08-18 14:20 ` Liang, Kan
2017-08-18 14:46 ` Mel Gorman
2017-08-18 14:46 ` Mel Gorman
2017-08-18 16:36 ` Tim Chen
2017-08-18 16:36 ` Tim Chen
2017-08-18 16:45 ` Andi Kleen
2017-08-18 16:45 ` Andi Kleen
2017-08-18 16:53 ` Liang, Kan
2017-08-18 16:53 ` Liang, Kan
2017-08-18 17:48 ` Linus Torvalds
2017-08-18 17:48 ` Linus Torvalds
2017-08-18 18:54 ` Mel Gorman
2017-08-18 18:54 ` Mel Gorman
2017-08-18 19:14 ` Linus Torvalds
2017-08-18 19:58 ` Andi Kleen
2017-08-18 19:58 ` Andi Kleen
2017-08-18 20:10 ` Linus Torvalds
2017-08-18 20:10 ` Linus Torvalds
2017-08-21 18:32 ` Mel Gorman
2017-08-21 18:32 ` Mel Gorman
2017-08-21 18:56 ` Liang, Kan
2017-08-21 18:56 ` Liang, Kan
2017-08-22 17:23 ` Liang, Kan
2017-08-22 17:23 ` Liang, Kan
2017-08-22 18:19 ` Linus Torvalds
2017-08-22 18:25 ` Linus Torvalds
2017-08-22 18:25 ` Linus Torvalds
2017-08-22 18:56 ` Peter Zijlstra
2017-08-22 18:56 ` Peter Zijlstra
2017-08-22 19:15 ` Linus Torvalds
2017-08-22 19:15 ` Linus Torvalds
2017-08-22 19:08 ` Peter Zijlstra
2017-08-22 19:08 ` Peter Zijlstra
2017-08-22 19:30 ` Linus Torvalds
2017-08-22 19:30 ` Linus Torvalds
2017-08-22 19:37 ` Andi Kleen
2017-08-22 19:37 ` Andi Kleen
2017-08-22 21:08 ` Christopher Lameter
2017-08-22 21:08 ` Christopher Lameter
2017-08-22 21:24 ` Andi Kleen
2017-08-22 21:24 ` Andi Kleen
2017-08-22 22:52 ` Linus Torvalds
2017-08-22 23:19 ` Linus Torvalds
2017-08-22 23:19 ` Linus Torvalds
2017-08-23 14:51 ` Liang, Kan
2017-08-23 14:51 ` Liang, Kan
2017-08-22 19:55 ` Liang, Kan
2017-08-22 20:42 ` Linus Torvalds
2017-08-22 20:53 ` Peter Zijlstra
2017-08-22 20:53 ` Peter Zijlstra
2017-08-22 20:58 ` Linus Torvalds
2017-08-22 20:58 ` Linus Torvalds
2017-08-23 14:49 ` Liang, Kan
2017-08-23 15:58 ` Tim Chen
2017-08-23 15:58 ` Tim Chen
2017-08-23 18:17 ` Linus Torvalds
2017-08-23 18:17 ` Linus Torvalds
2017-08-23 20:55 ` Liang, Kan
2017-08-23 20:55 ` Liang, Kan
2017-08-23 23:30 ` Linus Torvalds
2017-08-24 17:49 ` Tim Chen
2017-08-24 17:49 ` Tim Chen
2017-08-24 18:16 ` Linus Torvalds
2017-08-24 18:16 ` Linus Torvalds
2017-08-24 20:44 ` Mel Gorman
2017-08-24 20:44 ` Mel Gorman
2017-08-25 16:44 ` Tim Chen
2017-08-25 16:44 ` Tim Chen
2017-08-23 16:04 ` Mel Gorman
2017-08-23 16:04 ` Mel Gorman
2017-08-18 20:05 ` Andi Kleen
2017-08-18 20:05 ` Andi Kleen
2017-08-18 20:29 ` Linus Torvalds
2017-08-18 20:29 ` Linus Torvalds
2017-08-18 20:29 ` Liang, Kan
2017-08-18 20:29 ` Liang, Kan
2017-08-18 20:34 ` Linus Torvalds
2017-08-18 20:34 ` Linus Torvalds
2017-08-18 16:55 ` Linus Torvalds
2017-08-18 16:55 ` Linus Torvalds
2017-08-18 13:06 ` Liang, Kan
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