From: "David Hildenbrand (Arm)" <david@kernel.org>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.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,
Lorenzo Stoakes <ljs@kernel.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Mike Rapoport <rppt@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>, Zi Yan <ziy@nvidia.com>,
Chris Li <chrisl@kernel.org>, Kairui Song <kasong@tencent.com>,
Kemeng Shi <shikemeng@huaweicloud.com>,
Nhat Pham <nphamcs@gmail.com>, Baoquan He <bhe@redhat.com>,
Barry Song <baohua@kernel.org>,
Axel Rasmussen <axelrasmussen@google.com>,
Yuanchu Xie <yuanchu@google.com>, Wei Xu <weixugc@google.com>
Subject: Re: [PATCH RFC v2 17/18] mm: add free_frozen_pages_hint and put_page_hint APIs
Date: Tue, 21 Apr 2026 15:30:53 +0200 [thread overview]
Message-ID: <2a41dd0c-7ad8-4d34-8bab-a713e16c3b29@kernel.org> (raw)
In-Reply-To: <20260421091546-mutt-send-email-mst@kernel.org>
On 4/21/26 15:16, Michael S. Tsirkin wrote:
> On Tue, Apr 21, 2026 at 12:56:00PM +0200, David Hildenbrand (Arm) wrote:
>> On 4/20/26 14:51, Michael S. Tsirkin wrote:
>>> Add free_frozen_pages_hint(page, order, hints) to free a page
>>> while marking it as pre-zeroed when PGHINT_ZEROED is set.
>>> The PG_zeroed flag is set after __free_pages_prepare so it
>>> survives on the free list.
>>>
>>> Add __folio_put_hint(), folio_put_hint(), and put_page_hint()
>>> wrappers for the put_page path.
>>
>> Can we defer that change?
>
> We can - it's a dependency of the balloon deflate, which you asked
> me to implement. I'm more interested in reporting, myself.
Just to be clear, I said:
"I'd assume ordinary inflating+deflating of the balloon would also end
up with pre-zeroed pages. We'd just need a (mm/balloon.c -specific)
interface to tell the buddy that the pages are zeroed."
So while I think there will be value in that in the futur once we
figure out a clean interface, I don't recall asking you to implement that?
--
Cheers,
David
next prev parent reply other threads:[~2026-04-21 13:31 UTC|newest]
Thread overview: 42+ 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
2026-04-21 13:03 ` Michael S. Tsirkin
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
2026-04-21 10:58 ` David Hildenbrand (Arm)
2026-04-21 11:12 ` David Hildenbrand (Arm)
2026-04-21 11:25 ` David Hildenbrand (Arm)
2026-04-21 13:19 ` 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
2026-04-21 10:56 ` David Hildenbrand (Arm)
2026-04-21 13:16 ` Michael S. Tsirkin
2026-04-21 13:30 ` David Hildenbrand (Arm) [this message]
2026-04-21 13:44 ` Michael S. Tsirkin
2026-04-21 14:07 ` David Hildenbrand (Arm)
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 10:04 ` David Hildenbrand (Arm)
2026-04-21 14:15 ` Michael S. Tsirkin
2026-04-21 14:18 ` David Hildenbrand (Arm)
2026-04-21 13:06 ` Michael S. Tsirkin
2026-04-21 16:51 ` Gregory Price
2026-04-21 16:59 ` Michael S. Tsirkin
2026-04-21 10:50 ` David Hildenbrand (Arm)
2026-04-21 2:21 ` Gregory Price
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2a41dd0c-7ad8-4d34-8bab-a713e16c3b29@kernel.org \
--to=david@kernel.org \
--cc=Liam.Howlett@oracle.com \
--cc=aarcange@redhat.com \
--cc=akpm@linux-foundation.org \
--cc=axelrasmussen@google.com \
--cc=baohua@kernel.org \
--cc=bhe@redhat.com \
--cc=chrisl@kernel.org \
--cc=hannes@cmpxchg.org \
--cc=jackmanb@google.com \
--cc=jasowang@redhat.com \
--cc=kasong@tencent.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=ljs@kernel.org \
--cc=mhocko@suse.com \
--cc=mst@redhat.com \
--cc=nphamcs@gmail.com \
--cc=rppt@kernel.org \
--cc=shikemeng@huaweicloud.com \
--cc=surenb@google.com \
--cc=vbabka@kernel.org \
--cc=virtualization@lists.linux.dev \
--cc=weixugc@google.com \
--cc=yuanchu@google.com \
--cc=ziy@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox