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

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Message-ID: <519F40BB.1050504@meduna.org>
Date:	Fri, 24 May 2013 12:28:11 +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 10:29, Stanislav Meduna wrote:

>>>> static inline void __native_flush_tlb_single(unsigned long addr)
>>>> {
>>>>          __flush_tlb();
>>>> }
>>
>>> I will give it some more testing time.
>>
>> That is a good idea.
> 
> Still no crash, so this one indeed seems to change things.

Take that back, now crashed as well, it just took longer.
min_flt of two threads jumped from zero at 1848 (lower prio)
and 735993 (higher prio, preempted the first one) respectively,
1.7 seconds hang.

-- 
                                        Stano

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