From: Lance Yang <lance.yang@linux.dev>
To: kas@kernel.org
Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org,
ziy@nvidia.com, baolin.wang@linux.alibaba.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
kernel-team@meta.com, liam@infradead.org, nico.pache@linux.dev,
ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org,
lance.yang@linux.dev, usama.arif@linux.dev, vbabka@kernel.org,
jannh@google.com
Subject: Re: [PATCH v5 2/9] mm/khugepaged: count collapses where khugepaged makes them
Date: Thu, 15 Oct 2026 12:36:38 +0800 [thread overview]
Message-ID: <20261015043638.57643-1-lance.yang@linux.dev> (raw)
In-Reply-To: <20261014171145.3292736-3-kas@kernel.org>
On Wed, Oct 14, 2026 at 06:11:35PM +0100, Kiryl Shutsemau (Meta) wrote:
>collapse_single_pmd() bumps khugepaged_pages_collapsed for its caller, and
>tests cc->is_khugepaged to know whether it should: the counter belongs to
>the daemon, and MADV_COLLAPSE must not touch it.
>
>The daemon sees every result of every collapse it asks for, so it can keep
>its own counter without the shared path testing who called.
>
>Assisted-by: LLM
>Acked-by: David Hildenbrand (Arm) <david@kernel.org>
>Reviewed-by: Zi Yan <ziy@nvidia.com>
>Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
>Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org>
>---
Reviewed-by: Lance Yang <lance.yang@linux.dev>
next prev parent reply other threads:[~2026-10-15 4:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 17:11 [PATCH v5 0/9] mm/collapse: separate a collapse from its callers Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 1/9] mm/khugepaged: drop redundant mm_struct pin in madvise_collapse() Kiryl Shutsemau (Meta)
2026-10-15 4:34 ` Lance Yang
2026-10-14 17:11 ` [PATCH v5 2/9] mm/khugepaged: count collapses where khugepaged makes them Kiryl Shutsemau (Meta)
2026-10-15 4:36 ` Lance Yang [this message]
2026-10-14 17:11 ` [PATCH v5 3/9] mm/khugepaged: rename mthp_present_ptes bitmap to eligible_ptes Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 4/9] mm/collapse: add collapse.h for the collapse interface Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 5/9] mm/collapse: state what a collapse may do in the policy Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 6/9] mm/collapse: drop the collapse_possible() wrapper Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 7/9] mm/collapse: name the per-table scan reset for what it resets Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 8/9] mm/collapse: call collapse_file() from collapse_single_pmd() Kiryl Shutsemau (Meta)
2026-10-14 17:11 ` [PATCH v5 9/9] mm/collapse: separate scanning a PTE table from collapsing it Kiryl Shutsemau (Meta)
2026-10-14 21:16 ` [PATCH v5 0/9] mm/collapse: separate a collapse from its callers Andrew Morton
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