From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Thu, 4 Feb 2016 12:53:57 +0100
From: Henning Schild <henning.schild@siemens.com>
Message-ID: <20160204125357.7068aaa4@md1em3qc>
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Subject: Re: [Xenomai] [PATCH v3] ipipe x86 mm: handle huge pages in memory
 pinning
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To: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>, Xenomai <xenomai@xenomai.org>

On Wed, 3 Feb 2016 15:24:48 +0100
Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> wrote:

> On Wed, Feb 03, 2016 at 01:59:25PM +0100, Henning Schild wrote:
> > In 4.1 huge page mapping of io memory was introduced, enable ipipe
> > to handle that when pinning kernel memory.
> > 
> > change that introduced the feature
> > 0f616be120c632c818faaea9adcb8f05a7a8601f  
> 
> Could we have an assessment of whether avoiding the call to
> __ipipe_pin_range_mapping in upper layers makes the patch simpler?

I will have a look at that. Specifically why mainline does not run into
that. With the lazy nature of the mappings, when it comes to other
mm's, i still do not see why the vmalloc_fault path does not deal with
huge pages.

Henning