From: Michal Hocko <mhocko@suse.com>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: linux-mm@kvack.org, Roman Gushchin <guro@fb.com>,
Shakeel Butt <shakeelb@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] mm, oom: avoid printk() iteration under RCU
Date: Thu, 18 Jul 2019 10:30:14 +0200 [thread overview]
Message-ID: <20190718083014.GB30461@dhcp22.suse.cz> (raw)
In-Reply-To: <1563360901-8277-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
On Wed 17-07-19 19:55:01, Tetsuo Handa wrote:
> Currently dump_tasks() might call printk() for many thousands times under
> RCU, which might take many minutes for slow consoles.
Is is even wise to enable dumping tasks on systems with thousands of
tasks and slow consoles? I mean you still have to call printk that is
slow that many times. So why do we actually care? Because of RCU stall
warnings?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2019-07-18 8:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-17 10:55 Tetsuo Handa
2019-07-18 0:31 ` Shakeel Butt
2019-07-18 10:22 ` Tetsuo Handa
2019-07-18 8:30 ` Michal Hocko [this message]
2019-07-18 13:50 ` Tetsuo Handa
2019-07-18 14:02 ` Michal Hocko
2019-07-20 11:29 ` Tetsuo Handa
[not found] ` <20190920171042.8d970f9fc6f360de9b20ebbe@linux-foundation.org>
2019-09-21 20:30 ` Michal Hocko
[not found] ` <11c42f07-74d1-d4be-99bc-ca50d7c0ec71@i-love.sakura.ne.jp>
2019-09-22 6:20 ` Michal Hocko
[not found] ` <e4fac741-7dbc-41a1-7b9e-249415fba612@i-love.sakura.ne.jp>
2019-09-23 8:23 ` Michal Hocko
2019-07-23 23:14 ` Andrew Morton
2019-07-24 1:47 ` Tetsuo Handa
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