mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 08:02:37 +07:00
4da2ce250f
Joonsoo has noticed that "mm: drop migrate type checks from
has_unmovable_pages" would break CMA allocator because it relies on
has_unmovable_pages returning false even for CMA pageblocks which in
fact don't have to be movable:
alloc_contig_range
start_isolate_page_range
set_migratetype_isolate
has_unmovable_pages
This is a result of the code sharing between CMA and memory hotplug
while each one has a different idea of what has_unmovable_pages should
return. This is unfortunate but fixing it properly would require a lot
of code duplication.
Fix the issue by introducing the requested migrate type argument and
special case MIGRATE_CMA case where CMA page blocks are handled
properly. This will work for memory hotplug because it requires
MIGRATE_MOVABLE.
Link: http://lkml.kernel.org/r/20171019122118.y6cndierwl2vnguj@dhcp22.suse.cz
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Ran Wang <ran.wang_1@nxp.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Reza Arbab <arbab@linux.vnet.ibm.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: Yasuaki Ishimatsu <yasu.isimatu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __LINUX_PAGEISOLATION_H
|
|
#define __LINUX_PAGEISOLATION_H
|
|
|
|
#ifdef CONFIG_MEMORY_ISOLATION
|
|
static inline bool has_isolate_pageblock(struct zone *zone)
|
|
{
|
|
return zone->nr_isolate_pageblock;
|
|
}
|
|
static inline bool is_migrate_isolate_page(struct page *page)
|
|
{
|
|
return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
|
|
}
|
|
static inline bool is_migrate_isolate(int migratetype)
|
|
{
|
|
return migratetype == MIGRATE_ISOLATE;
|
|
}
|
|
#else
|
|
static inline bool has_isolate_pageblock(struct zone *zone)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool is_migrate_isolate_page(struct page *page)
|
|
{
|
|
return false;
|
|
}
|
|
static inline bool is_migrate_isolate(int migratetype)
|
|
{
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
|
|
int migratetype, bool skip_hwpoisoned_pages);
|
|
void set_pageblock_migratetype(struct page *page, int migratetype);
|
|
int move_freepages_block(struct zone *zone, struct page *page,
|
|
int migratetype, int *num_movable);
|
|
|
|
/*
|
|
* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
|
|
* If specified range includes migrate types other than MOVABLE or CMA,
|
|
* this will fail with -EBUSY.
|
|
*
|
|
* For isolating all pages in the range finally, the caller have to
|
|
* free all pages in the range. test_page_isolated() can be used for
|
|
* test it.
|
|
*/
|
|
int
|
|
start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
|
|
unsigned migratetype, bool skip_hwpoisoned_pages);
|
|
|
|
/*
|
|
* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
|
|
* target range is [start_pfn, end_pfn)
|
|
*/
|
|
int
|
|
undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
|
|
unsigned migratetype);
|
|
|
|
/*
|
|
* Test all pages in [start_pfn, end_pfn) are isolated or not.
|
|
*/
|
|
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
|
|
bool skip_hwpoisoned_pages);
|
|
|
|
struct page *alloc_migrate_target(struct page *page, unsigned long private,
|
|
int **resultp);
|
|
|
|
#endif
|