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drm/pagemap: Unlock and put folios when possible

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If the page is part of a folio, unlock and put the whole folio at once
instead of individual pages one after the other. This will reduce the
amount of operations once device THP are in use.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: linux-mm@kvack.org
Suggested-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Balbir Singh <balbirs@nvidia.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260312192126.2024853-2-francois.dugast@intel.com
This commit is contained in:
Francois Dugast
2026-03-12 20:20:11 +01:00
committed by Matthew Brost
parent 4f3a998a17
commit 440ec190c2
1 changed files with 17 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/gpu/drm/drm_pagemap.c
View File

@@ -154,15 +154,15 @@ static void drm_pagemap_zdd_put(struct drm_pagemap_zdd *zdd)
}
/**
* drm_pagemap_migration_unlock_put_page() - Put a migration page
* @page: Pointer to the page to put
* drm_pagemap_migration_unlock_put_folio() - Put a migration folio
* @folio: Pointer to the folio to put
*
* This function unlocks and puts a page.
* This function unlocks and puts a folio.
*/
static void drm_pagemap_migration_unlock_put_page(struct page *page)
static void drm_pagemap_migration_unlock_put_folio(struct folio *folio)
{
unlock_page(page);
put_page(page);
folio_unlock(folio);
folio_put(folio);
}
/**
@@ -177,15 +177,23 @@ static void drm_pagemap_migration_unlock_put_pages(unsigned long npages,
{
unsigned long i;
for (i = 0; i < npages; ++i) {
for (i = 0; i < npages;) {
struct page *page;
struct folio *folio;
unsigned int order = 0;
if (!migrate_pfn[i])
continue;
goto next;
page = migrate_pfn_to_page(migrate_pfn[i]);
drm_pagemap_migration_unlock_put_page(page);
folio = page_folio(page);
order = folio_order(folio);
drm_pagemap_migration_unlock_put_folio(folio);
migrate_pfn[i] = 0;
next:
i += NR_PAGES(order);
}
}