The quilt patch titled
Subject: mm: page_isolation: enable arbitrary range page isolation.
has been removed from the -mm tree. Its filename was
mm-page_isolation-enable-arbitrary-range-page-isolation.patch
This patch was dropped because it was merged into the mm-stable branch\nof git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Zi Yan <ziy@xxxxxxxxxx>
Subject: mm: page_isolation: enable arbitrary range page isolation.
Now start_isolate_page_range() is ready to handle arbitrary range
isolation, so move the alignment check/adjustment into the function body.
Do the same for its counterpart undo_isolate_page_range().
alloc_contig_range(), its caller, can pass an arbitrary range instead of a
MAX_ORDER_NR_PAGES aligned one.
Link: https://lkml.kernel.org/r/20220425143118.2850746-5-zi.yan@xxxxxxxx
Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Eric Ren <renzhengeek@xxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 16 ++--------------
mm/page_isolation.c | 33 ++++++++++++++++-----------------
2 files changed, 18 insertions(+), 31 deletions(-)
--- a/mm/page_alloc.c~mm-page_isolation-enable-arbitrary-range-page-isolation
+++ a/mm/page_alloc.c
@@ -8956,16 +8956,6 @@ void *__init alloc_large_system_hash(con
}
#ifdef CONFIG_CONTIG_ALLOC
-static unsigned long pfn_max_align_down(unsigned long pfn)
-{
- return ALIGN_DOWN(pfn, MAX_ORDER_NR_PAGES);
-}
-
-static unsigned long pfn_max_align_up(unsigned long pfn)
-{
- return ALIGN(pfn, MAX_ORDER_NR_PAGES);
-}
-
#if defined(CONFIG_DYNAMIC_DEBUG) || \
(defined(CONFIG_DYNAMIC_DEBUG_CORE) && defined(DYNAMIC_DEBUG_MODULE))
/* Usage: See admin-guide/dynamic-debug-howto.rst */
@@ -9107,8 +9097,7 @@ int alloc_contig_range(unsigned long sta
* put back to page allocator so that buddy can use them.
*/
- ret = start_isolate_page_range(pfn_max_align_down(start),
- pfn_max_align_up(end), migratetype, 0, gfp_mask);
+ ret = start_isolate_page_range(start, end, migratetype, 0, gfp_mask);
if (ret)
goto done;
@@ -9189,8 +9178,7 @@ int alloc_contig_range(unsigned long sta
free_contig_range(end, outer_end - end);
done:
- undo_isolate_page_range(pfn_max_align_down(start),
- pfn_max_align_up(end), migratetype);
+ undo_isolate_page_range(start, end, migratetype);
return ret;
}
EXPORT_SYMBOL(alloc_contig_range);
--- a/mm/page_isolation.c~mm-page_isolation-enable-arbitrary-range-page-isolation
+++ a/mm/page_isolation.c
@@ -444,7 +444,6 @@ failed:
* be MIGRATE_ISOLATE.
* @start_pfn: The lower PFN of the range to be isolated.
* @end_pfn: The upper PFN of the range to be isolated.
- * start_pfn/end_pfn must be aligned to pageblock_order.
* @migratetype: Migrate type to set in error recovery.
* @flags: The following flags are allowed (they can be combined in
* a bit mask)
@@ -491,33 +490,33 @@ int start_isolate_page_range(unsigned lo
{
unsigned long pfn;
struct page *page;
+ /* isolation is done at page block granularity */
+ unsigned long isolate_start = ALIGN_DOWN(start_pfn, pageblock_nr_pages);
+ unsigned long isolate_end = ALIGN(end_pfn, pageblock_nr_pages);
int ret;
- BUG_ON(!IS_ALIGNED(start_pfn, pageblock_nr_pages));
- BUG_ON(!IS_ALIGNED(end_pfn, pageblock_nr_pages));
-
- /* isolate [start_pfn, start_pfn + pageblock_nr_pages) pageblock */
- ret = isolate_single_pageblock(start_pfn, gfp_flags, false);
+ /* isolate [isolate_start, isolate_start + pageblock_nr_pages) pageblock */
+ ret = isolate_single_pageblock(isolate_start, gfp_flags, false);
if (ret)
return ret;
- /* isolate [end_pfn - pageblock_nr_pages, end_pfn) pageblock */
- ret = isolate_single_pageblock(end_pfn, gfp_flags, true);
+ /* isolate [isolate_end - pageblock_nr_pages, isolate_end) pageblock */
+ ret = isolate_single_pageblock(isolate_end, gfp_flags, true);
if (ret) {
- unset_migratetype_isolate(pfn_to_page(start_pfn), migratetype);
+ unset_migratetype_isolate(pfn_to_page(isolate_start), migratetype);
return ret;
}
/* skip isolated pageblocks at the beginning and end */
- for (pfn = start_pfn + pageblock_nr_pages;
- pfn < end_pfn - pageblock_nr_pages;
+ for (pfn = isolate_start + pageblock_nr_pages;
+ pfn < isolate_end - pageblock_nr_pages;
pfn += pageblock_nr_pages) {
page = __first_valid_page(pfn, pageblock_nr_pages);
if (page && set_migratetype_isolate(page, migratetype, flags,
start_pfn, end_pfn)) {
- undo_isolate_page_range(start_pfn, pfn, migratetype);
+ undo_isolate_page_range(isolate_start, pfn, migratetype);
unset_migratetype_isolate(
- pfn_to_page(end_pfn - pageblock_nr_pages),
+ pfn_to_page(isolate_end - pageblock_nr_pages),
migratetype);
return -EBUSY;
}
@@ -533,12 +532,12 @@ void undo_isolate_page_range(unsigned lo
{
unsigned long pfn;
struct page *page;
+ unsigned long isolate_start = ALIGN_DOWN(start_pfn, pageblock_nr_pages);
+ unsigned long isolate_end = ALIGN(end_pfn, pageblock_nr_pages);
- BUG_ON(!IS_ALIGNED(start_pfn, pageblock_nr_pages));
- BUG_ON(!IS_ALIGNED(end_pfn, pageblock_nr_pages));
- for (pfn = start_pfn;
- pfn < end_pfn;
+ for (pfn = isolate_start;
+ pfn < isolate_end;
pfn += pageblock_nr_pages) {
page = __first_valid_page(pfn, pageblock_nr_pages);
if (!page || !is_migrate_isolate_page(page))
_
Patches currently in -mm which might be from ziy@xxxxxxxxxx are
