From: "Michael S. Tsirkin" <mst@redhat.com>
To: Sourav Panda <souravpanda@google.com>
Cc: muchun.song@linux.dev, osalvador@suse.de,
akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org,
liam@infradead.org, vbabka@kernel.org, rppt@kernel.org,
surenb@google.com, mhocko@suse.com, mhklinux@outlook.com,
fvdl@google.com, gthelen@google.com, mike.kravetz@oracle.com,
pasha.tatashin@soleen.com, rientjes@google.com, riel@surriel.com,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org
Subject: Re: [PATCH 6/6] mm/hugetlb: support free page reporting for cached hugepages
Date: Tue, 7 Jul 2026 06:18:16 -0400 [thread overview]
Message-ID: <20260707032839-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20260707064235.1386552-7-souravpanda@google.com>
On Tue, Jul 07, 2026 at 06:42:35AM +0000, Sourav Panda wrote:
> Implement free page reporting for the HugeTLB dynamic cache.
>
> Register HugeTLB hstates with the page reporting framework if they
> support caching.
>
> When pages are added to the cache (either via recycling in
> free_huge_folio or direct population via sysfs nr_cached_hugepages),
> trigger a page reporting cycle.
>
> Page reporting isolates pages from the cache list, reports them to the
> hypervisor via virtio-balloon, and then drains them back to the cache
> list, marking them as reported (HPG_reported).
>
> If a page is allocated from the cache, or reclaimed, clear the reported
> flag.
>
> Signed-off-by: Sourav Panda <souravpanda@google.com>
So if you are going to look into this, I feel the 1st step
should be reporting pages from hugepage_freelists - this
can be done independently.
--
MST
next prev parent reply other threads:[~2026-07-07 10:18 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-07 6:42 [RFC PATCH 0/6] mm/hugetlb: Dynamic, NUMA-aware HugePage Cache & Free Page Reporting Sourav Panda
2026-07-07 6:42 ` [PATCH 1/6] mm/hugetlb: add Kconfig and basic cache infrastructure Sourav Panda
2026-07-07 6:42 ` [PATCH 2/6] mm/hugetlb: implement cache recycling and allocation Sourav Panda
2026-07-07 6:42 ` [PATCH 3/6] mm/hugetlb: add sysfs interfaces for cache Sourav Panda
2026-07-07 6:42 ` [PATCH 4/6] mm/hugetlb: add memory shrinker " Sourav Panda
2026-07-07 6:42 ` [PATCH 5/6] Documentation/admin-guide/mm/hugetlbpage.rst: document cache interfaces Sourav Panda
2026-07-07 6:42 ` [PATCH 6/6] mm/hugetlb: support free page reporting for cached hugepages Sourav Panda
2026-07-07 7:18 ` Michael S. Tsirkin
2026-07-07 10:18 ` Michael S. Tsirkin [this message]
2026-07-07 6:56 ` [RFC PATCH 0/6] mm/hugetlb: Dynamic, NUMA-aware HugePage Cache & Free Page Reporting Michael S. Tsirkin
2026-07-07 7:21 ` Sourav Panda
2026-07-07 7:29 ` David Hildenbrand (Arm)
2026-07-07 8:09 ` Muchun Song
2026-07-07 10:25 ` Michael S. Tsirkin
2026-07-07 10:28 ` David Hildenbrand (Arm)
2026-07-07 11:06 ` Lorenzo Stoakes
2026-07-07 14:01 ` Michael S. Tsirkin
2026-07-07 18:46 ` Lorenzo Stoakes
2026-07-07 19:32 ` Michael S. Tsirkin
2026-07-07 19:46 ` David Hildenbrand (Arm)
2026-07-08 8:26 ` Lorenzo Stoakes
2026-07-08 9:16 ` Michael S. Tsirkin
2026-07-09 6:15 ` Sourav Panda
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