[PATCH v10 5/5] drivers: virtio_mem: use pageblock size as the minimum virtio_mem size.

From: Zi Yan <zi.yan@sent.com>
To: David Hildenbrand <david@redhat.com>, linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,
	virtualization@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 v10 5/5] drivers: virtio_mem: use pageblock size as the minimum virtio_mem size.
Date: Wed,  6 Apr 2022 11:18:58 -0400	[thread overview]
Message-ID: <20220406151858.3149821-6-zi.yan@sent.com> (raw)
In-Reply-To: <20220406151858.3149821-1-zi.yan@sent.com>

From: Zi Yan <ziy@nvidia.com>

alloc_contig_range() now only needs to be aligned to pageblock_nr_pages,
drop virtio_mem size requirement that it needs to be MAX_ORDER_NR_PAGES.

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_mem *vm)
 				      VIRTIO_MEM_DEFAULT_OFFLINE_THRESHOLD);
 
 	/*
-	 * 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 = PAGE_SIZE * MAX_ORDER_NR_PAGES;
+	sb_size = PAGE_SIZE * pageblock_nr_pages;
 	sb_size = max_t(uint64_t, vm->device_block_size, sb_size);
 
 	if (sb_size < memory_block_size_bytes() && !force_bbm) {
-- 
2.35.1

