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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Apr 24, 2026 at 07:50:37PM +0300, Mika Penttilä wrote: > On 4/24/26 19:23, Andrew Morton wrote: > > > On Tue, 14 Apr 2026 07:12:21 +0300 mpenttil@redhat.com wrote: > > > >> From: Mika Penttilä > >> > >> Currently, the way device page faulting and migration works > >> is not optimal, if you want to do both fault handling and > >> migration at once. > >> > >> Being able to migrate not present pages (or pages mapped with incorrect > >> permissions, eg. COW) to the GPU requires doing either of the > >> following sequences: > >> > >> ... > >> > > Via which tree would it be best to upstream this? > > > >> include/linux/hmm.h | 19 +- > >> include/linux/migrate.h | 26 +- > >> lib/test_hmm.c | 101 ++- > >> lib/test_hmm_uapi.h | 19 +- > >> mm/Kconfig | 2 + > >> mm/hmm.c | 821 +++++++++++++++++++++++-- > >> mm/migrate_device.c | 589 +++--------------- > >> tools/testing/selftests/mm/hmm-tests.c | 54 ++ > >> 8 files changed, 1053 insertions(+), 578 deletions(-) > > Looks like mm.git. > > > > It might be more useful to add it to a DRM tree if there's ongoing > > development against this. But please no upstreaming without good > > review! > > > > Anyway, this is a bit dated and Sashiko AI review wasn't able to apply > > the patches. Nor was it able to apply v7 or v6. So please refresh, > > retest, resend? > > It is against Linus tree v7.0, base-commit: 028ef9c96e96197026887c0f092424679298aae8, > but applies and passes hmm selftests on mm trees as is. > > I plan to do v9 refresh and maybe minor updates in week or so. > It might be good to send a version which applies to drm-tip to intel-xe@lists.freedesktop.org to trigger our CI too. I know tested an earlier rev and everything seemed to be working but another round of testing before merging is likely a good idea. Matt > --Mika >