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Message-Id: <20220210072828.2930359-13-hch@lst.de>
Date: Thu, 10 Feb 2022 08:28:13 +0100
From: Christoph Hellwig <hch@....de>
To: Andrew Morton <akpm@...ux-foundation.org>,
Dan Williams <dan.j.williams@...el.com>
Cc: Felix Kuehling <Felix.Kuehling@....com>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
"Pan, Xinhui" <Xinhui.Pan@....com>,
Ben Skeggs <bskeggs@...hat.com>,
Karol Herbst <kherbst@...hat.com>,
Lyude Paul <lyude@...hat.com>, Jason Gunthorpe <jgg@...pe.ca>,
Alistair Popple <apopple@...dia.com>,
Logan Gunthorpe <logang@...tatee.com>,
Ralph Campbell <rcampbell@...dia.com>,
linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
nvdimm@...ts.linux.dev, linux-mm@...ck.org
Subject: [PATCH 12/27] mm: refactor the ZONE_DEVICE handling in migrate_vma_pages
Make the flow a little more clear and prepare for adding a new
ZONE_DEVICE memory type.
Signed-off-by: Christoph Hellwig <hch@....de>
---
mm/migrate.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
diff --git a/mm/migrate.c b/mm/migrate.c
index 30ecd7223656c1..746e1230886ddb 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2788,24 +2788,21 @@ void migrate_vma_pages(struct migrate_vma *migrate)
mapping = page_mapping(page);
- if (is_zone_device_page(newpage)) {
- if (is_device_private_page(newpage)) {
- /*
- * For now only support private anonymous when
- * migrating to un-addressable device memory.
- */
- if (mapping) {
- migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
- continue;
- }
- } else {
- /*
- * Other types of ZONE_DEVICE page are not
- * supported.
- */
+ if (is_device_private_page(newpage)) {
+ /*
+ * For now only support private anonymous when migrating
+ * to un-addressable device memory.
+ */
+ if (mapping) {
migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
continue;
}
+ } else if (is_zone_device_page(newpage)) {
+ /*
+ * Other types of ZONE_DEVICE page are not supported.
+ */
+ migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;
+ continue;
}
r = migrate_page(mapping, newpage, page, MIGRATE_SYNC_NO_COPY);
--
2.30.2
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