From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: <linux-kernel@vger.kernel.org>,
Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>,
David Airlie <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Dan Carpenter <dan.carpenter@oracle.com>, Wei Liu <wl@xen.org>,
"Yan Yankovskyi" <yyankovskyi@gmail.com>,
<dri-devel@lists.freedesktop.org>,
<xen-devel@lists.xenproject.org>, <linux-mm@kvack.org>,
David Hildenbrand <david@redhat.com>,
Michal Hocko <mhocko@kernel.org>,
Dan Williams <dan.j.williams@intel.com>
Subject: Re: [PATCH v4 2/2] xen: add helpers to allocate unpopulated memory
Date: Thu, 13 Aug 2020 09:54:20 +0200 [thread overview]
Message-ID: <20200813075420.GC975@Air-de-Roger> (raw)
In-Reply-To: <20200813073337.GA16160@infradead.org>
On Thu, Aug 13, 2020 at 08:33:37AM +0100, Christoph Hellwig wrote:
> On Tue, Aug 11, 2020 at 11:44:47AM +0200, Roger Pau Monne wrote:
> > If enabled (because ZONE_DEVICE is supported) the usage of the new
> > functionality untangles Xen balloon and RAM hotplug from the usage of
> > unpopulated physical memory ranges to map foreign pages, which is the
> > correct thing to do in order to avoid mappings of foreign pages depend
> > on memory hotplug.
>
> So please just select ZONE_DEVICE if this is so much better rather
> than maintaining two variants.
We still need to other variant for Arm at least, so both need to be
maintained anyway, even if we force ZONE_DEVICE on x86.
Thanks, Roger.
next prev parent reply other threads:[~2020-08-13 7:54 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200811094447.31208-1-roger.pau@citrix.com>
2020-08-11 9:44 ` [PATCH v4 1/2] memremap: rename MEMORY_DEVICE_DEVDAX to MEMORY_DEVICE_GENERIC Roger Pau Monne
2020-08-11 21:07 ` David Hildenbrand
2020-08-20 11:37 ` Roger Pau Monné
2020-08-31 10:19 ` Roger Pau Monné
2020-08-31 20:56 ` Ira Weiny
2020-08-31 19:20 ` Andrew Morton
2020-08-11 9:44 ` [PATCH v4 2/2] xen: add helpers to allocate unpopulated memory Roger Pau Monne
2020-08-12 7:28 ` Jürgen Groß
2020-08-12 7:38 ` Roger Pau Monné
2020-08-13 7:33 ` Christoph Hellwig
2020-08-13 7:54 ` Roger Pau Monné [this message]
2020-08-13 9:49 ` Daniel Vetter
2020-08-13 10:02 ` Roger Pau Monné
2020-08-14 7:29 ` Christoph Hellwig
2020-08-14 9:56 ` Roger Pau Monné
2020-08-14 10:27 ` Jürgen Groß
2020-08-14 12:47 ` Roger Pau Monné
2020-08-14 12:54 ` Jürgen Groß
2020-08-14 13:35 ` Roger Pau Monné
2020-08-14 13:52 ` Jürgen Groß
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