From: "Michael S. Tsirkin" <mst@redhat.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH v5 00/28] mm/virtio: skip redundant zeroing of host-zeroed pages
Date: Thu, 7 May 2026 18:33:19 -0400 [thread overview]
Message-ID: <20260507183212-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <cover.1778192416.git.mst@redhat.com>
On Thu, May 07, 2026 at 06:22:28PM -0400, Michael S. Tsirkin wrote:
> When a guest reports free pages to the hypervisor via virtio-balloon's
> free page reporting, the host typically zeros those pages when reclaiming
> their backing memory (e.g., via MADV_DONTNEED on anonymous mappings).
> When the guest later reallocates those pages, the kernel zeros them
> again, redundantly.
i just noticed that i have accidentally moved reported to after
inflate ( So there will be v6 but please do review.
prev parent reply other threads:[~2026-05-07 22:33 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-07 22:22 [PATCH v5 00/28] mm/virtio: skip redundant zeroing of host-zeroed pages Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 01/28] mm: mempolicy: fix interleave index for unaligned VMA start Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 02/28] mm: thread user_addr through page allocator for cache-friendly zeroing Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 03/28] mm: add folio_zero_user stub for configs without THP/HUGETLBFS Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 04/28] mm: page_alloc: move prep_compound_page before post_alloc_hook Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 05/28] mm: use folio_zero_user for user pages in post_alloc_hook Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 06/28] mm: use __GFP_ZERO in vma_alloc_zeroed_movable_folio Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 07/28] mm: alloc_anon_folio: pass raw fault address to vma_alloc_folio Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 08/28] mm: use __GFP_ZERO in alloc_anon_folio Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 09/28] mm: vma_alloc_anon_folio_pmd: pass raw fault address to vma_alloc_folio Michael S. Tsirkin
2026-05-08 3:36 ` Dev Jain
2026-05-08 5:01 ` Lance Yang
2026-05-08 6:11 ` Michael S. Tsirkin
2026-05-08 6:10 ` Michael S. Tsirkin
2026-05-08 12:10 ` David Hildenbrand (Arm)
2026-05-09 19:32 ` Michael S. Tsirkin
2026-05-08 13:12 ` Lorenzo Stoakes
2026-05-09 19:35 ` Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 10/28] mm: use __GFP_ZERO in vma_alloc_anon_folio_pmd Michael S. Tsirkin
2026-05-07 22:22 ` [PATCH v5 11/28] mm: hugetlb: use __GFP_ZERO and skip zeroing for zeroed pages Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 12/28] mm: memfd: skip zeroing for zeroed hugetlb pool pages Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 13/28] mm: remove arch vma_alloc_zeroed_movable_folio overrides Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 14/28] mm: page_reporting: allow driver to set batch capacity Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 15/28] mm: page_alloc: propagate PageReported flag across buddy splits Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 16/28] mm: page_reporting: skip redundant zeroing of host-zeroed reported pages Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 17/28] mm: page_reporting: add per-page zeroed bitmap for host feedback Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 18/28] mm: page_alloc: clear PG_zeroed on buddy merge if not both zero Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 19/28] mm: page_alloc: preserve PG_zeroed in page_del_and_expand Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 20/28] virtio_balloon: submit reported pages as individual buffers Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 21/28] mm: page_reporting: add flush parameter with page budget Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 22/28] mm: page_alloc: propagate PG_zeroed in split_large_buddy Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 23/28] mm: add free_frozen_pages_zeroed Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 24/28] mm: add put_page_zeroed and folio_put_zeroed Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 25/28] virtio_balloon: implement VIRTIO_BALLOON_F_DEVICE_INIT_ON_INFLATE Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 26/28] mm: balloon: use put_page_zeroed for zeroed balloon pages Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 27/28] virtio_balloon: disable reporting zeroed optimization for confidential guests Michael S. Tsirkin
2026-05-07 22:23 ` [PATCH v5 28/28] virtio_balloon: implement VIRTIO_BALLOON_F_DEVICE_INIT_REPORTED Michael S. Tsirkin
2026-05-07 22:33 ` Michael S. Tsirkin [this message]
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