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From:   Zi Yan <zi.yan@sent.com>
To:     David Hildenbrand <david@redhat.com>, linux-mm@kvack.org
Cc:     linux-kernel@vger.kernel.org,
        Michael Ellerman <mpe@ellerman.id.au>,
        Christoph Hellwig <hch@lst.de>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Robin Murphy <robin.murphy@arm.com>,
        linuxppc-dev@lists.ozlabs.org,
        virtualization@lists.linux-foundation.org,
        iommu@lists.linux-foundation.org, Vlastimil Babka <vbabka@suse.cz>,
        Mel Gorman <mgorman@techsingularity.net>,
        Eric Ren <renzhengeek@gmail.com>,
        Mike Rapoport <rppt@kernel.org>,
        Oscar Salvador <osalvador@suse.de>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Zi Yan <ziy@nvidia.com>
Subject: [PATCH v6 5/5] drivers: virtio_mem: use pageblock size as the minimum virtio_mem size.
Date:   Tue, 22 Feb 2022 23:30:37 -0500
Message-Id: <20220223043037.715205-6-zi.yan@sent.com>
In-Reply-To: <20220223043037.715205-1-zi.yan@sent.com>
References: <20220223043037.715205-1-zi.yan@sent.com>
Reply-To: Zi Yan <ziy@nvidia.com>
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From: Zi Yan <ziy@nvidia.com>

alloc_contig_range() now only needs to be aligned to pageblock_order,
drop virtio_mem size requirement that it needs to be the max of
pageblock_order and MAX_ORDER.

Signed-off-by: Zi Yan <ziy@nvidia.com>
---
 drivers/virtio/virtio_mem.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index e7d6b679596d..e07486f01999 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/drivers/virtio/virtio_mem.c
@@ -2476,10 +2476,10 @@ static int virtio_mem_init_hotplug(struct virtio_me=
m *vm)
 				      VIRTIO_MEM_DEFAULT_OFFLINE_THRESHOLD);
=20
 	/*
-	 * TODO: once alloc_contig_range() works reliably with pageblock
-	 * granularity on ZONE_NORMAL, use pageblock_nr_pages instead.
+	 * alloc_contig_range() works reliably with pageblock
+	 * granularity on ZONE_NORMAL, use pageblock_nr_pages.
 	 */
-	sb_size =3D PAGE_SIZE * MAX_ORDER_NR_PAGES;
+	sb_size =3D PAGE_SIZE * pageblock_nr_pages;
 	sb_size =3D max_t(uint64_t, vm->device_block_size, sb_size);
=20
 	if (sb_size < memory_block_size_bytes() && !force_bbm) {
--=20
2.34.1