From: "Kasireddy, Vivek" <vivek.kasireddy@intel.com>
To: Jason Gunthorpe <jgg@nvidia.com>, David Hildenbrand <david@redhat.com>
Cc: "dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
Mike Kravetz <mike.kravetz@oracle.com>,
"Hugh Dickins" <hughd@google.com>, Peter Xu <peterx@redhat.com>,
Gerd Hoffmann <kraxel@redhat.com>,
"Kim, Dongwon" <dongwon.kim@intel.com>,
"Chang, Junxiao" <junxiao.chang@intel.com>
Subject: RE: [PATCH v1 0/3] udmabuf: Add support for page migration out of movable zone or CMA
Date: Sun, 27 Aug 2023 18:49:50 +0000 [thread overview]
Message-ID: <IA0PR11MB71857A044B51DBEBD7D131F7F8E1A@IA0PR11MB7185.namprd11.prod.outlook.com> (raw)
In-Reply-To: <ZOjlBGcj2VMP+ptd@nvidia.com>
Hi Jason, David,
>
> > Sure, we can simply always fail when we detect ZONE_MOVABLE or
> MIGRATE_CMA.
> > Maybe that keeps at least some use cases working.
>
> That seems fairly reasonable
AFAICS, failing udmabuf_create() if we detect one or more pages are in
ZONE_MOVABLE or MIGRATE_CMA would not be a recoverable failure --
as it would result in the failure of Guest GUI (or compositor).
I think it makes sense to have a generic version of
And, since check_and_migrate_movable_pages() is GUP-specific, would
it be ok to create a generic version of that (in mm/migrate.c) which can be
used by udmabuf and/or other drivers in the future?
Thanks,
Vivek
>
> Jason
next prev parent reply other threads:[~2023-08-27 18:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-17 6:49 Vivek Kasireddy
2023-08-17 6:49 ` [PATCH v1 1/3] mm/gup: Export check_and_migrate_movable_pages() Vivek Kasireddy
2023-08-30 14:15 ` Christoph Hellwig
2023-08-17 6:49 ` [PATCH v1 2/3] udmabuf: Add support for page migration out of movable zone or CMA Vivek Kasireddy
2023-08-17 6:49 ` [PATCH v1 3/3] selftests/dma-buf/udmabuf: Add tests to verify data after page migration Vivek Kasireddy
2023-08-17 15:01 ` [PATCH v1 0/3] udmabuf: Add support for page migration out of movable zone or CMA Jason Gunthorpe
2023-08-22 5:36 ` Kasireddy, Vivek
2023-08-22 12:23 ` Jason Gunthorpe
2023-08-23 9:34 ` David Hildenbrand
2023-08-24 6:31 ` Kasireddy, Vivek
2023-08-24 18:30 ` David Hildenbrand
2023-08-24 18:30 ` Jason Gunthorpe
2023-08-24 18:33 ` David Hildenbrand
2023-08-25 17:29 ` Jason Gunthorpe
2023-08-27 18:49 ` Kasireddy, Vivek [this message]
2023-08-27 19:05 ` Kasireddy, Vivek
2023-08-30 17:30 ` Jason Gunthorpe
2023-09-14 13:43 ` David Hildenbrand
2023-09-16 18:31 ` Kasireddy, Vivek
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