linux-kernel - Re: [PATCH] mm: fix up a spurious page fault whenever it happens

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Message-ID: <519F7159.5010009@meduna.org>
Date:	Fri, 24 May 2013 15:55:37 +0200
From:	Stanislav Meduna <stano@...una.org>
To:	Rik van Riel <riel@...hat.com>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-rt-users@...r.kernel.org" <linux-rt-users@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Hai Huang <hhuang@...hat.com>
Subject: Re: [PATCH] mm: fix up a spurious page fault whenever it happens

On 24.05.2013 15:06, Rik van Riel wrote:

> Just to rule something out, are you using
> transparent huge pages on those systems?

On my present test system they are configured in, but I am
not using them.

# cat /proc/meminfo | grep Huge
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       4096 kB

However during my (many) previous experiments the problem
also happened with kernels that did not have it configured.

Thanks
-- 
                                      Stano

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