From: Yu Zhao <yuzhao@google.com>
To: Ryan Roberts <ryan.roberts@arm.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Hugh Dickins <hughd@google.com>,
Johannes Weiner <hannes@cmpxchg.org>
Cc: Will Deacon <will@kernel.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Nick Piggin <npiggin@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Arnd Bergmann <arnd@arndb.de>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
David Hildenbrand <david@redhat.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
Yin Fengwei <fengwei.yin@intel.com>,
Yang Shi <shy828301@gmail.com>,
"Huang, Ying" <ying.huang@intel.com>, Zi Yan <ziy@nvidia.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 3/4] mm/mmu_gather: Remove encoded_page infrastructure
Date: Thu, 10 Aug 2023 11:34:57 -0600 [thread overview]
Message-ID: <CAOUHufZatMprwzaT+=Lb6jSw60DN_Br=Og+N6krK3OQZiGyAYA@mail.gmail.com> (raw)
In-Reply-To: <20230810103332.3062143-4-ryan.roberts@arm.com>
On Thu, Aug 10, 2023 at 4:33 AM Ryan Roberts <ryan.roberts@arm.com> wrote:
>
> commit 70fb4fdff582 ("mm: introduce 'encoded' page pointers with
> embedded extra bits") and commit 7cc8f9c7146a ("mm: mmu_gather: prepare
> to gather encoded page pointers with flags") converted mmu_gather for
> dealing with encoded_page, where the bottom 2 bits could encode extra
> flags. Only 1 bit was ever used; to flag whether the page should
> participate in a delayed rmap removal.
>
> Now that the mmu_gather batched rmap removal mechanism has been
> generalized, all pages participate and therefore the flag is unused. So
> let's remove encoded_page to simplify the code. It also gets in the way
> of further optimization which will be done in a follow up patch.
Adding the original author and reviewers... They might want (need) to
take a look at this series.
next prev parent reply other threads:[~2023-08-10 17:35 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-10 10:33 [PATCH v1 0/4] Optimize mmap_exit for large folios Ryan Roberts
2023-08-10 10:33 ` [PATCH v1 1/4] mm: Implement folio_remove_rmap_range() Ryan Roberts
2023-08-10 10:33 ` [PATCH v1 2/4] mm/mmu_gather: generalize mmu_gather rmap removal mechanism Ryan Roberts
2023-08-10 10:33 ` [PATCH v1 3/4] mm/mmu_gather: Remove encoded_page infrastructure Ryan Roberts
2023-08-10 17:34 ` Yu Zhao [this message]
2023-08-10 18:31 ` Linus Torvalds
2023-08-10 18:54 ` Ryan Roberts
2023-08-10 10:33 ` [PATCH v1 4/4] mm/mmu_gather: Store and process pages in contig ranges Ryan Roberts
2023-08-10 14:44 ` Zi Yan
2023-08-10 14:55 ` Ryan Roberts
2023-08-10 14:59 ` Zi Yan
2023-08-10 15:05 ` Ryan Roberts
2023-12-04 12:26 ` Ryan Roberts
2023-12-04 12:28 ` David Hildenbrand
2023-12-04 12:39 ` Ryan Roberts
2023-12-04 12:43 ` David Hildenbrand
2023-12-04 12:57 ` Ryan Roberts
2023-08-25 4:09 ` Matthew Wilcox
2023-08-25 7:13 ` David Hildenbrand
2023-08-29 14:02 ` Ryan Roberts
2023-08-29 14:19 ` Matthew Wilcox
2023-08-29 14:24 ` Matthew Wilcox
2023-08-29 15:59 ` Ryan Roberts
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