Date: Thu, 20 Aug 2015 09:56:11 +0200
From: Michal Hocko <mhocko@kernel.org>
To: Eric B Munson <emunson@akamai.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>, Jonathan Corbet <corbet@lwn.net>,
        "Kirill A. Shutemov" <kirill@shutemov.name>,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-mm@kvack.org, linux-api@vger.kernel.org
Subject: Re: [PATCH v7 3/6] mm: Introduce VM_LOCKONFAULT
Message-ID: <20150820075611.GD4780@dhcp22.suse.cz>
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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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