From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michal Hocko Subject: Re: [PATCH v7 3/6] mm: Introduce VM_LOCKONFAULT Date: Thu, 20 Aug 2015 09:56:11 +0200 Message-ID: <20150820075611.GD4780@dhcp22.suse.cz> References: <1439097776-27695-1-git-send-email-emunson@akamai.com> <1439097776-27695-4-git-send-email-emunson@akamai.com> <20150812115909.GA5182@dhcp22.suse.cz> <20150819213345.GB4536@akamai.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20150819213345.GB4536-JqFfY2XvxFXQT0dZR+AlfA@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Eric B Munson Cc: Andrew Morton , Vlastimil Babka , Jonathan Corbet , "Kirill A. Shutemov" , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: dri-devel@lists.freedesktop.org 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