Messages in this thread | | | Subject | Re: [PATCH 1/2] mem-hotplug: use GFP_HIGHUSER_MOVABLE in, alloc_migrate_target() | From | Vlastimil Babka <> | Date | Mon, 18 Jul 2016 09:45:20 +0200 |
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On 07/18/2016 07:51 AM, Joonsoo Kim wrote: > On Fri, Jul 15, 2016 at 10:47:06AM +0800, Xishi Qiu wrote: >> alloc_migrate_target() is called from migrate_pages(), and the page >> is always from user space, so we can add __GFP_HIGHMEM directly. > > No, all migratable pages are not from user space. For example, > blockdev file cache has __GFP_MOVABLE and migratable but it has no > __GFP_HIGHMEM and __GFP_USER. > > And, zram's memory isn't GFP_HIGHUSER_MOVABLE but has __GFP_MOVABLE.
Right, and there's also Minchan's series for arbitrary driver page migration...
> Thanks. >
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