From: David Hildenbrand <david@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
etnaviv@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-rdma@vger.kernel.org,
linux-media@vger.kernel.org, linux-kselftest@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Jason Gunthorpe <jgg@ziepe.ca>,
John Hubbard <jhubbard@nvidia.com>, Peter Xu <peterx@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Hugh Dickins <hughd@google.com>, Nadav Amit <namit@vmware.com>,
Vlastimil Babka <vbabka@suse.cz>,
Matthew Wilcox <willy@infradead.org>,
Mike Kravetz <mike.kravetz@oracle.com>,
Muchun Song <songmuchun@bytedance.com>,
Lucas Stach <l.stach@pengutronix.de>,
David Airlie <airlied@gmail.com>,
Oded Gabbay <ogabbay@kernel.org>, Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH RFC 00/19] mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning)
Date: Tue, 8 Nov 2022 10:29:17 +0100 [thread overview]
Message-ID: <ee9fceb8-f928-8754-d94f-54b662bb0c74@redhat.com> (raw)
In-Reply-To: <CAHk-=wj51-dtxf8BQBYP+9Kc3ejq4Y0=-6hCbf_XAnkT3fsgDQ@mail.gmail.com>
On 07.11.22 18:27, Linus Torvalds wrote:
> On Mon, Nov 7, 2022 at 8:18 AM David Hildenbrand <david@redhat.com> wrote:
>>
>> So instead, make R/O long-term pinning work as expected, by breaking COW
>> in a COW mapping early, such that we can remove any FOLL_FORCE usage from
>> drivers.
>
> Nothing makes me unhappy from a quick scan through these patches.
>
> And I'd really love to just have this long saga ended, and FOLL_FORCE
> finally relegated to purely ptrace accesses.
>
> So an enthusiastic Ack from me.
Thanks Linus! My hope is that we can remove it from all drivers and not
have to leave it in for some corner cases; so far it looks promising.
--
Thanks,
David / dhildenb
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next prev parent reply other threads:[~2022-11-08 9:31 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-07 16:17 [PATCH RFC 00/19] mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning) David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 01/19] selftests/vm: anon_cow: prepare for non-anonymous COW tests David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 02/19] selftests/vm: cow: basic COW tests for non-anonymous pages David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 03/19] selftests/vm: cow: R/O long-term pinning reliability tests for non-anon pages David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 04/19] mm: add early FAULT_FLAG_UNSHARE consistency checks David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 05/19] mm: add early FAULT_FLAG_WRITE " David Hildenbrand
2022-11-07 19:03 ` Nadav Amit
2022-11-07 19:27 ` David Hildenbrand
2022-11-07 19:50 ` Nadav Amit
2022-11-07 16:17 ` [PATCH RFC 06/19] mm: rework handling in do_wp_page() based on private vs. shared mappings David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 07/19] mm: don't call vm_ops->huge_fault() in wp_huge_pmd()/wp_huge_pud() for private mappings David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 08/19] mm: extend FAULT_FLAG_UNSHARE support to anything in a COW mapping David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 09/19] mm/gup: reliable R/O long-term pinning in COW mappings David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 10/19] RDMA/umem: remove FOLL_FORCE usage David Hildenbrand
2022-11-14 8:30 ` Leon Romanovsky
2022-11-07 16:17 ` [PATCH RFC 11/19] RDMA/usnic: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 12/19] RDMA/siw: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 13/19] media: videobuf-dma-sg: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 14/19] drm/etnaviv: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 15/19] media: pci/ivtv: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 16/19] mm/frame-vector: " David Hildenbrand
2022-11-08 4:45 ` Tomasz Figa
2022-11-08 9:40 ` David Hildenbrand
2022-11-22 12:25 ` Hans Verkuil
2022-11-22 12:38 ` David Hildenbrand
2022-11-22 14:07 ` Hans Verkuil
2022-11-22 15:03 ` David Hildenbrand
2022-11-22 17:33 ` Linus Torvalds
2022-11-07 16:17 ` [PATCH RFC 17/19] drm/exynos: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 18/19] RDMA/hw/qib/qib_user_pages: " David Hildenbrand
2022-11-07 16:17 ` [PATCH RFC 19/19] habanalabs: " David Hildenbrand
2022-11-07 21:25 ` Oded Gabbay
2022-11-07 17:27 ` [PATCH RFC 00/19] mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning) Linus Torvalds
2022-11-08 9:29 ` David Hildenbrand [this message]
2022-11-14 6:03 ` Christoph Hellwig
2022-11-14 8:07 ` David Hildenbrand
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