Displaying 20 results from an estimated 22 matches for "page_mapping_flag".
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page_mapping_flags
2016 May 27
2
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
..."page_mapping" refers to the inode
> * address_space which maps the page from disk; whereas "page_mapped"
> * refers to user virtual address space into which the page is mapped.
> */
> -#define PAGE_MAPPING_ANON 1
> -#define PAGE_MAPPING_KSM 2
> -#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
> +#define PAGE_MAPPING_ANON 0x1
> +#define PAGE_MAPPING_MOVABLE 0x2
> +#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
> +#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
>
> -static __always_inline...
2016 May 27
2
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
..."page_mapping" refers to the inode
> * address_space which maps the page from disk; whereas "page_mapped"
> * refers to user virtual address space into which the page is mapped.
> */
> -#define PAGE_MAPPING_ANON 1
> -#define PAGE_MAPPING_KSM 2
> -#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
> +#define PAGE_MAPPING_ANON 0x1
> +#define PAGE_MAPPING_MOVABLE 0x2
> +#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
> +#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
>
> -static __always_inline...
2016 May 30
5
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...Please note that, confusingly, "page_mapping" refers to the inode
* address_space which maps the page from disk; whereas "page_mapped"
* refers to user virtual address space into which the page is mapped.
*/
-#define PAGE_MAPPING_ANON 1
-#define PAGE_MAPPING_KSM 2
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
+#define PAGE_MAPPING_ANON 0x1
+#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-static __always_inline int PageAnonHead(struct page...
2016 May 30
5
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...Please note that, confusingly, "page_mapping" refers to the inode
* address_space which maps the page from disk; whereas "page_mapped"
* refers to user virtual address space into which the page is mapped.
*/
-#define PAGE_MAPPING_ANON 1
-#define PAGE_MAPPING_KSM 2
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
+#define PAGE_MAPPING_ANON 0x1
+#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-static __always_inline int PageAnonHead(struct page...
2016 May 09
0
[PATCH v5 02/12] mm: migrate: support non-lru movable page migration
...Please note that, confusingly, "page_mapping" refers to the inode
* address_space which maps the page from disk; whereas "page_mapped"
* refers to user virtual address space into which the page is mapped.
*/
-#define PAGE_MAPPING_ANON 1
-#define PAGE_MAPPING_KSM 2
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
+#define PAGE_MAPPING_ANON 0x1
+#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-static __always_inline int PageAnonHead(struct page...
2016 May 30
0
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...t; --- a/mm/util.c
> +++ b/mm/util.c
> @@ -399,10 +399,12 @@ struct address_space *page_mapping(struct page *page)
> }
>
> mapping = page->mapping;
I'd probably use READ_ONCE() here to be safe. Not all callers are under
page lock?
> - if ((unsigned long)mapping & PAGE_MAPPING_FLAGS)
> + if ((unsigned long)mapping & PAGE_MAPPING_ANON)
> return NULL;
> - return mapping;
> +
> + return (void *)((unsigned long)mapping & ~PAGE_MAPPING_FLAGS);
> }
> +EXPORT_SYMBOL(page_mapping);
>
> /* Slow path of page_mapcount() for compound pages */
>...
2016 May 20
0
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...Please note that, confusingly, "page_mapping" refers to the inode
* address_space which maps the page from disk; whereas "page_mapped"
* refers to user virtual address space into which the page is mapped.
*/
-#define PAGE_MAPPING_ANON 1
-#define PAGE_MAPPING_KSM 2
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
+#define PAGE_MAPPING_ANON 0x1
+#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-static __always_inline int PageAnonHead(struct page...
2016 May 30
0
[PATCH v6 02/12] mm: migrate: support non-lru movable page migration
...; refers to the inode
> > * address_space which maps the page from disk; whereas "page_mapped"
> > * refers to user virtual address space into which the page is mapped.
> > */
> >-#define PAGE_MAPPING_ANON 1
> >-#define PAGE_MAPPING_KSM 2
> >-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
> >+#define PAGE_MAPPING_ANON 0x1
> >+#define PAGE_MAPPING_MOVABLE 0x2
> >+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
> >+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
> >
> >...
2016 May 31
0
[PATCH v6v3 02/12] mm: migrate: support non-lru movable page migration
...Please note that, confusingly, "page_mapping" refers to the inode
* address_space which maps the page from disk; whereas "page_mapped"
* refers to user virtual address space into which the page is mapped.
*/
-#define PAGE_MAPPING_ANON 1
-#define PAGE_MAPPING_KSM 2
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_KSM)
+#define PAGE_MAPPING_ANON 0x1
+#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-static __always_inline int PageAnonHead(struct page...
2016 May 20
5
[PATCH v6 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 20
5
[PATCH v6 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 30
1
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...under page lock?
I don't understand. Yeah, all caller are not under page lock but at least,
new user of movable pages should call it under page_lock.
Yeah, I will write the rule down in document.
In this case, what kinds of problem do you see?
>
> >- if ((unsigned long)mapping & PAGE_MAPPING_FLAGS)
> >+ if ((unsigned long)mapping & PAGE_MAPPING_ANON)
> > return NULL;
> >- return mapping;
> >+
> >+ return (void *)((unsigned long)mapping & ~PAGE_MAPPING_FLAGS);
> > }
> >+EXPORT_SYMBOL(page_mapping);
> >
> > /* Slow path of page_m...
2016 May 30
1
PATCH v6v2 02/12] mm: migrate: support non-lru movable page migration
...under page lock?
I don't understand. Yeah, all caller are not under page lock but at least,
new user of movable pages should call it under page_lock.
Yeah, I will write the rule down in document.
In this case, what kinds of problem do you see?
>
> >- if ((unsigned long)mapping & PAGE_MAPPING_FLAGS)
> >+ if ((unsigned long)mapping & PAGE_MAPPING_ANON)
> > return NULL;
> >- return mapping;
> >+
> >+ return (void *)((unsigned long)mapping & ~PAGE_MAPPING_FLAGS);
> > }
> >+EXPORT_SYMBOL(page_mapping);
> >
> > /* Slow path of page_m...
2016 May 09
5
[PATCH v5 00/13] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 09
5
[PATCH v5 00/13] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 Apr 27
4
[PATCH v4 00/13] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 Apr 27
4
[PATCH v4 00/13] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 31
7
[PATCH v7 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2016 May 31
7
[PATCH v7 00/12] Support non-lru page migration
Recently, I got many reports about perfermance degradation in embedded
system(Android mobile phone, webOS TV and so on) and easy fork fail.
The problem was fragmentation caused by zram and GPU driver mainly.
With memory pressure, their pages were spread out all of pageblock and
it cannot be migrated with current compaction algorithm which supports
only LRU pages. In the end, compaction cannot
2019 Aug 09
6
[RFC PATCH v6 71/92] mm: add support for remote mapping
...44
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -417,8 +417,10 @@ PAGEFLAG(Idle, idle, PF_ANY)
*/
#define PAGE_MAPPING_ANON 0x1
#define PAGE_MAPPING_MOVABLE 0x2
+#define PAGE_MAPPING_REMOTE 0x4
#define PAGE_MAPPING_KSM (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_FLAGS (PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE | \
+ PAGE_MAPPING_REMOTE)
static __always_inline int PageMappingFlags(struct page *page)
{
@@ -431,6 +433,11 @@ static __always_inline int PageAnon(struct page *page)
return...