From: "Huang, Ying" <ying.huang@linux.alibaba.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
Vlastimil Babka <vbabka@kernel.org>,
Brendan Jackman <jackmanb@google.com>,
Michal Hocko <mhocko@suse.com>,
Suren Baghdasaryan <surenb@google.com>,
Jason Wang <jasowang@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
linux-mm@kvack.org, virtualization@lists.linux.dev,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Mike Rapoport <rppt@kernel.org>,
Matthew Brost <matthew.brost@intel.com>,
Joshua Hahn <joshua.hahnjy@gmail.com>,
Rakie Kim <rakie.kim@sk.com>, Byungchul Park <byungchul@sk.com>,
Gregory Price <gourry@gourry.net>,
Alistair Popple <apopple@nvidia.com>
Subject: Re: [PATCH RFC v2 02/18] mm: add pghint_t type and vma_alloc_folio_hints API
Date: Tue, 21 Apr 2026 08:58:59 +0800 [thread overview]
Message-ID: <87pl3ti0x8.fsf@DESKTOP-5N7EMDA> (raw)
In-Reply-To: <290d615a001cf121dc0c604eb79451bcc7917baa.1776689093.git.mst@redhat.com> (Michael S. Tsirkin's message of "Mon, 20 Apr 2026 08:50:23 -0400")
"Michael S. Tsirkin" <mst@redhat.com> writes:
> Add pghint_t, a bitwise type for communicating page allocation hints
> between the allocator and callers. Define PGHINT_ZEROED to indicate
> that the allocated page contents are known to be zero.
>
> Add _hints variants of the allocation functions that accept a
> pghint_t *hints output parameter:
>
> vma_alloc_folio_hints() -> folio_alloc_mpol_hints (internal)
> -> __alloc_frozen_pages_hints()
>
> The existing APIs are unchanged and continue to work without hints.
> For now, hints is always initialized to 0. A subsequent patch will
> set PGHINT_ZEROED when the page was pre-zeroed by the host.
Why do we need this feature? Is there any performance impact? If so,
please provide some performance data.
[snip]
---
Best Regards,
Huang, Ying
next prev parent reply other threads:[~2026-04-21 0:59 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-20 12:51 [PATCH RFC v2 00/18] mm/virtio: skip redundant zeroing of host-zeroed reported pages Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 01/18] mm: page_alloc: propagate PageReported flag across buddy splits Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 02/18] mm: add pghint_t type and vma_alloc_folio_hints API Michael S. Tsirkin
2026-04-21 0:58 ` Huang, Ying [this message]
2026-04-20 12:50 ` [PATCH RFC v2 03/18] mm: add PG_zeroed page flag for known-zero pages Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 04/18] mm: page_alloc: track PG_zeroed across buddy merges Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 05/18] mm: page_alloc: preserve PG_zeroed in try_to_claim_block Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 06/18] mm: page_alloc: thread pghint_t through get_page_from_freelist Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 07/18] mm: post_alloc_hook: use PG_zeroed to skip zeroing, return pghint_t Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 08/18] mm: hugetlb: thread pghint_t through buddy allocation chain Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 09/18] mm: hugetlb: use PG_zeroed for pool pages, skip redundant zeroing Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 10/18] mm: page_reporting: support host-zeroed reported pages Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 11/18] mm: skip zeroing in vma_alloc_zeroed_movable_folio for pre-zeroed pages Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 12/18] mm: skip zeroing in alloc_anon_folio " Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 13/18] mm: skip zeroing in vma_alloc_anon_folio_pmd " Michael S. Tsirkin
2026-04-20 12:50 ` [PATCH RFC v2 14/18] mm: memfd: skip zeroing for pre-zeroed hugetlb pages Michael S. Tsirkin
2026-04-20 12:51 ` [PATCH RFC v2 15/18] virtio_balloon: add host_zeroes_pages module parameter Michael S. Tsirkin
2026-04-20 12:51 ` [PATCH RFC v2 16/18] mm: page_reporting: add flush parameter with page budget Michael S. Tsirkin
2026-04-20 12:51 ` [PATCH RFC v2 17/18] mm: add free_frozen_pages_hint and put_page_hint APIs Michael S. Tsirkin
2026-04-20 12:51 ` [PATCH RFC v2 18/18] virtio_balloon: mark deflated pages as pre-zeroed Michael S. Tsirkin
2026-04-20 18:09 ` [syzbot ci] Re: mm/virtio: skip redundant zeroing of host-zeroed reported pages syzbot ci
2026-04-20 18:20 ` [PATCH RFC v2 00/18] " David Hildenbrand (Arm)
2026-04-20 23:33 ` Michael S. Tsirkin
2026-04-21 2:38 ` Gregory Price
2026-04-21 2:21 ` Gregory Price
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