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mm: honor PF_MEMALLOC_PIN for all movable pages

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PF_MEMALLOC_PIN is only honored for CMA pages, extend this flag to work
for any allocations from ZONE_MOVABLE by removing __GFP_MOVABLE from
gfp_mask when this flag is passed in the current context.

Add is_pinnable_page() to return true if page is in a pinnable page.  A
pinnable page is not in ZONE_MOVABLE and not of MIGRATE_CMA type.

Link: https://lkml.kernel.org/r/20210215161349.246722-8-pasha.tatashin@soleen.com
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: James Morris <jmorris@namei.org>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Tyler Hicks <tyhicks@linux.microsoft.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Tatashin
2021-05-04 18:39:00 -07:00
committed by Linus Torvalds
parent da6df1b0fc
commit 8e3560d963
4 changed files with 33 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
include/linux/mm.h
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@@ -1141,6 +1141,11 @@ static inline bool is_zone_device_page(const struct page *page)
}
#endif
static inline bool is_zone_movable_page(const struct page *page)
{
return page_zonenum(page) == ZONE_MOVABLE;
}
#ifdef CONFIG_DEV_PAGEMAP_OPS
void free_devmap_managed_page(struct page *page);
DECLARE_STATIC_KEY_FALSE(devmap_managed_key);
@@ -1550,6 +1555,19 @@ static inline unsigned long page_to_section(const struct page *page)
}
#endif
/* MIGRATE_CMA and ZONE_MOVABLE do not allow pin pages */
#ifdef CONFIG_MIGRATION
static inline bool is_pinnable_page(struct page *page)
{
return !is_zone_movable_page(page) && !is_migrate_cma_page(page);
}
#else
static inline bool is_pinnable_page(struct page *page)
{
return true;
}
#endif
static inline void set_page_zone(struct page *page, enum zone_type zone)
{
page->flags &= ~(ZONES_MASK << ZONES_PGSHIFT);