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Message-ID: <20150820075611.GD4780@dhcp22.suse.cz>
Date: Thu, 20 Aug 2015 09:56:11 +0200
From: Michal Hocko <mhocko@...nel.org>
To: Eric B Munson <emunson@...mai.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Vlastimil Babka <vbabka@...e.cz>,
Jonathan Corbet <corbet@....net>,
"Kirill A. Shutemov" <kirill@...temov.name>,
linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-mm@...ck.org, linux-api@...r.kernel.org
Subject: Re: [PATCH v7 3/6] mm: Introduce VM_LOCKONFAULT
On Wed 19-08-15 17:33:45, Eric B Munson wrote:
[...]
> The group which asked for this feature here
> wants the ability to distinguish between LOCKED and LOCKONFAULT regions
> and without the VMA flag there isn't a way to do that.
Could you be more specific on why this is needed?
> Do we know that these last two open flags are needed right now or is
> this speculation that they will be and that none of the other VMA flags
> can be reclaimed?
I do not think they are needed by anybody right now but that is not a
reason why it should be used without a really strong justification.
If the discoverability is really needed then fair enough but I haven't
seen any justification for that yet.
--
Michal Hocko
SUSE Labs
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