From: Andrew Morton <akpm@linux-foundation.org>
To: Dev Jain <dev.jain@arm.com>
Cc: david@kernel.org, ljs@kernel.org, hughd@google.com,
chrisl@kernel.org, kasong@tencent.com, riel@surriel.com,
liam@infradead.org, vbabka@kernel.org, harry@kernel.org,
jannh@google.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, qi.zheng@linux.dev,
shakeel.butt@linux.dev, baohua@kernel.org,
axelrasmussen@google.com, yuanchu@google.com, weixugc@google.com,
rppt@kernel.org, surenb@google.com, mhocko@suse.com,
baolin.wang@linux.alibaba.com, shikemeng@huaweicloud.com,
nphamcs@gmail.com, bhe@redhat.com, youngjun.park@lge.com,
pfalcato@suse.de, ryan.roberts@arm.com,
anshuman.khandual@arm.com
Subject: Re: [PATCH v3 0/9] Optimize anonymous large folio unmapping
Date: Fri, 8 May 2026 16:38:42 -0700 [thread overview]
Message-ID: <20260508163842.ad2b2202f827d3f86228758d@linux-foundation.org> (raw)
In-Reply-To: <20260506094504.2588857-1-dev.jain@arm.com>
On Wed, 6 May 2026 15:14:55 +0530 Dev Jain <dev.jain@arm.com> wrote:
> Speed up unmapping of anonymous large folios by clearing the ptes, and
> setting swap ptes, in one go.
>
> ...
>
> Performance as measured on a Linux VM on Apple M3 (arm64):
>
> Vanilla - Mean: 37401913 ns, std dev: 12%
> Patched - Mean: 17420282 ns, std dev: 11%
>
> No regression observed on 4K folios.
>
> Performance as measured on bare metal x86:
>
> Vanilla - mean: 54986286 ns, std dev: 1.5%
> Patched - mean: 51930795 ns, std dev: 3%
That looks nice.
I'll pass at this time, wait for reviewer input. Most reviewers are
jetlagged and exhausted, so a resend might be needed ;)
Saskiko said a few things:
https://sashiko.dev/#/patchset/20260506094504.2588857-1-dev.jain@arm.com
next prev parent reply other threads:[~2026-05-08 23:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-06 9:44 [PATCH v3 0/9] Optimize anonymous large folio unmapping Dev Jain
2026-05-06 9:44 ` [PATCH v3 1/9] mm/rmap: initialize nr_pages to 1 at loop start in try_to_unmap_one Dev Jain
2026-05-11 6:48 ` David Hildenbrand (Arm)
2026-05-11 8:18 ` Dev Jain
2026-05-11 8:32 ` David Hildenbrand (Arm)
2026-05-06 9:44 ` [PATCH v3 2/9] mm/rmap: refactor hugetlb pte clearing " Dev Jain
2026-05-11 7:10 ` David Hildenbrand (Arm)
2026-05-11 8:53 ` Dev Jain
2026-05-11 8:59 ` David Hildenbrand (Arm)
2026-05-06 9:44 ` [PATCH v3 3/9] mm/rmap: refactor some code around lazyfree folio unmapping Dev Jain
2026-05-11 7:28 ` David Hildenbrand (Arm)
2026-05-06 9:44 ` [PATCH v3 4/9] mm/memory: Batch set uffd-wp markers during zapping Dev Jain
2026-05-11 7:37 ` David Hildenbrand (Arm)
2026-05-06 9:45 ` [PATCH v3 5/9] mm/rmap: batch unmap folios belonging to uffd-wp VMAs Dev Jain
2026-05-11 7:41 ` David Hildenbrand (Arm)
2026-05-06 9:45 ` [PATCH v3 6/9] mm/swapfile: Add batched version of folio_dup_swap Dev Jain
2026-05-11 7:45 ` David Hildenbrand (Arm)
2026-05-06 9:45 ` [PATCH v3 7/9] mm/swapfile: Add batched version of folio_put_swap Dev Jain
2026-05-11 8:07 ` David Hildenbrand (Arm)
2026-05-06 9:45 ` [PATCH v3 8/9] mm/rmap: Add batched version of folio_try_share_anon_rmap_pte Dev Jain
2026-05-11 8:13 ` David Hildenbrand (Arm)
2026-05-11 8:14 ` David Hildenbrand (Arm)
2026-05-06 9:45 ` [PATCH v3 9/9] mm/rmap: enable batch unmapping of anonymous folios Dev Jain
2026-05-11 8:16 ` David Hildenbrand (Arm)
2026-05-08 23:38 ` Andrew Morton [this message]
2026-05-11 6:21 ` [PATCH v3 0/9] Optimize anonymous large folio unmapping Dev Jain
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