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From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Sasha Levin <sasha.levin@oracle.com>,
	LKML <linux-kernel@vger.kernel.org>,
	Rusty Russell <rusty@rustcorp.com.au>,
	Dave Jones <davej@redhat.com>, Michal Hocko <mhocko@suse.cz>,
	the arch/x86 maintainers <x86@kernel.org>
Subject: Re: Hang on large copy_from_user with PREEMPT_NONE
Date: Tue, 7 Apr 2015 13:05:31 +0200	[thread overview]
Message-ID: <20150407110531.GA14136@gmail.com> (raw)
In-Reply-To: <20150407103955.GB14095@pd.tnic>


* Borislav Petkov <bp@alien8.de> wrote:

> On Tue, Apr 07, 2015 at 11:31:45AM +0200, Ingo Molnar wrote:
> > Would be nice to see the actual kernel .config, as there's a few
> > debug features that can slow things down significantly, such as
> > CONFIG_KMEMCHECK=y or in some cases CONFIG_DEBUG_PAGEALLOC=y.
> 
> He sent it here: https://lkml.kernel.org/r/55229D7E.6080309@oracle.com
> 
> I'm attaching it again.

Thanks. Nothing particularly expensive stands out to me at a quick 
glance:-/

Thanks,

	Ingo

  reply	other threads:[~2015-04-07 11:05 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-06  3:59 Hang on large copy_from_user with PREEMPT_NONE Sasha Levin
2015-04-06 11:24 ` Borislav Petkov
2015-04-06 14:51   ` Sasha Levin
2015-04-06 16:52     ` Borislav Petkov
2015-04-06 17:26 ` Linus Torvalds
2015-04-06 19:08   ` Sasha Levin
2015-04-06 19:36     ` Borislav Petkov
2015-04-06 23:45       ` Sasha Levin
2015-04-06 20:42     ` Linus Torvalds
2015-04-07  1:49       ` Rusty Russell
2015-04-07  9:31       ` Ingo Molnar
2015-04-07 10:39         ` Borislav Petkov
2015-04-07 11:05           ` Ingo Molnar [this message]
2015-04-07 14:30             ` Michal Hocko
2015-04-07 14:37               ` Ingo Molnar
2015-04-07 17:00                 ` Sasha Levin
2015-04-07 17:33                   ` Linus Torvalds
2015-04-07 17:58                     ` Dave Jones
     [not found]                       ` <CA+55aFyxCb9aDfh0L4gyvHMSefOFoD7zftRpWbnvf5j9iZVaMw@mail.gmail.com>
2015-04-07 21:09                         ` Dave Jones

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