linux-kernel - Re: [PATCH v2 1/5] uaccess: add pagefault_count to thread

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Message-ID: <20141215124822.GH21343@twins.programming.kicks-ass.net>
Date:	Mon, 15 Dec 2014 13:48:22 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Hildenbrand <dahi@...ux.vnet.ibm.com>
Cc:	"LF.Tan" <lftan.linux@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	benh@...nel.crashing.org, paulus@...ba.org,
	akpm@...ux-foundation.org, heiko.carstens@...ibm.com,
	schwidefsky@...ibm.com, borntraeger@...ibm.com,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>, David.Laight@...lab.com,
	hughd@...gle.com, hocko@...e.cz
Subject: Re: [PATCH v2 1/5] uaccess: add pagefault_count to thread_info

On Mon, Dec 15, 2014 at 12:23:01PM +0100, David Hildenbrand wrote:
> Peter just showed my that there is some work ongoing on that
> pagefault_disable() topic. So I am not sure if the arch-specific part of this
> series is still relevant.

Well 'on-going' would be over stating it. We did those bits in -rt many
years ago, but never really made a strong enough effort to get them
upstream.

If there now is a 'semi' sane use-case for upstreaming them we should
indeed look at that.
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