From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: "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,
"Xuan Zhuo" <xuanzhuo@linux.alibaba.com>,
"Eugenio Pérez" <eperezma@redhat.com>
Subject: [PATCH RFC v2 18/18] virtio_balloon: mark deflated pages as pre-zeroed
Date: Mon, 20 Apr 2026 08:51:10 -0400 [thread overview]
Message-ID: <1b1f7c79ef36716f7819c8e2a65a3d4a1fde3b46.1776689093.git.mst@redhat.com> (raw)
In-Reply-To: <cover.1776689093.git.mst@redhat.com>
Mark deflated pages as pre-zeroed when host_zeroes_pages is set.
Use put_page_hint() with PGHINT_ZEROED during deflation so the
freed pages carry PG_zeroed in the buddy allocator, allowing the
next allocation to skip redundant zeroing.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Assisted-by: Claude:claude-opus-4-6
Assisted-by: cursor-agent:GPT-5.4-xhigh
---
drivers/virtio/virtio_balloon.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 2e524bf6f934..9b35203f579d 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -299,7 +299,10 @@ static void release_pages_balloon(struct virtio_balloon *vb,
list_for_each_entry_safe(page, next, pages, lru) {
list_del(&page->lru);
- put_page(page); /* balloon reference */
+ if (host_zeroes_pages)
+ put_page_hint(page, PGHINT_ZEROED);
+ else
+ put_page(page);
}
}
--
MST
next prev parent reply other threads:[~2026-04-20 12:51 UTC|newest]
Thread overview: 29+ 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
2026-04-20 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)
2026-04-20 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)
2026-04-20 12:51 ` Michael S. Tsirkin [this message]
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 10:50 ` David Hildenbrand (Arm)
2026-04-21 2:21 ` Gregory Price
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