linux-kernel - Re: running get_user_pages() from kernel thread

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Message-ID: <20090616203844.GE23969@random.random>
Date:	Tue, 16 Jun 2009 22:38:44 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc:	Rik van Riel <riel@...hat.com>, Izik Eidus <ieidus@...hat.com>,
	linux-kernel@...r.kernel.org, nickpiggin@...oo.com.au
Subject: Re: running get_user_pages() from kernel thread

On Tue, Jun 16, 2009 at 08:45:05PM +0100, Hugh Dickins wrote:
> liking the below better - what do you think?  If you approve, I'll send
> it in to Andrew for mmotm: I can't quite justify it without KSM.

I think it's definitely better to fix gup to be safe from kernel
thread even without KSM so this can go in mainline well before KSM.
Unless gup requires a swapin fault it won't ever trigger.
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