search for: driver_page_migratable

...* Skip any other type of page > */ > if (!PageLRU(page)) { > - if (unlikely(balloon_page_movable(page))) { > - if (balloon_page_isolate(page)) { > + if (unlikely(driver_page_migratable(page))) { > + if (page->mapping->a_ops->isolatepage(page, > + isolate_mode)) { Dereferencing page->mapping isn't safe here. Page could be "truncated" from mapping at any time...

...* Skip any other type of page > */ > if (!PageLRU(page)) { > - if (unlikely(balloon_page_movable(page))) { > - if (balloon_page_isolate(page)) { > + if (unlikely(driver_page_migratable(page))) { > + if (page->mapping->a_ops->isolatepage(page, > + isolate_mode)) { Dereferencing page->mapping isn't safe here. Page could be "truncated" from mapping at any time...

...ter. - * It's possible to migrate LRU pages and balloon pages + * It's possible to migrate LRU pages and driver pages * Skip any other type of page */ if (!PageLRU(page)) { - if (unlikely(balloon_page_movable(page))) { - if (balloon_page_isolate(page)) { + if (unlikely(driver_page_migratable(page))) { + if (page->mapping->a_ops->isolatepage(page, + isolate_mode)) { /* Successfully isolated */ goto isolate_success; } diff --git a/mm/migrate.c b/mm/migrate.c index 236ee25..a0bc1e4 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -35,7 +35,7 @@ #include...

Hello, This series try to enable migration of non-LRU pages, such as driver's page. My ARM-based platform occured severe fragmentation problem after long-term (several days) test. Sometimes even order-3 page allocation failed. It has memory size 512MB ~ 1024MB. 30% ~ 40% memory is consumed for graphic processing and 20~30 memory is reserved for zram. I found that many pages of GPU driver

Hello, This series try to enable migration of non-LRU pages, such as driver's page. My ARM-based platform occured severe fragmentation problem after long-term (several days) test. Sometimes even order-3 page allocation failed. It has memory size 512MB ~ 1024MB. 30% ~ 40% memory is consumed for graphic processing and 20~30 memory is reserved for zram. I found that many pages of GPU driver

.../* compaction didn't start as it was deferred due to past failures */ #define COMPACT_DEFERRED 0 @@ -51,6 +54,10 @@ extern void compaction_defer_reset(struct zone *zone, int order, bool alloc_success); extern bool compaction_restarting(struct zone *zone, int order); +static inline bool driver_page_migratable(struct page *page) +{ + return PageMigratable(page) && mapping_migratable(page->mapping); +} #else static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order, int alloc_flags, @@ -83,6 +90,10 @@ static inline bool compaction_deferred(struct zone *zone, int...

Hello, This series try to enable migration of non-LRU pages, such as driver's page. My ARM-based platform occured severe fragmentation problem after long-term (several days) test. Sometimes even order-3 page allocation failed. It has memory size 512MB ~ 1024MB. 30% ~ 40% memory is consumed for graphic processing and 20~30 memory is reserved for zram. I found that many pages of GPU driver

Hello, This series try to enable migration of non-LRU pages, such as driver's page. My ARM-based platform occured severe fragmentation problem after long-term (several days) test. Sometimes even order-3 page allocation failed. It has memory size 512MB ~ 1024MB. 30% ~ 40% memory is consumed for graphic processing and 20~30 memory is reserved for zram. I found that many pages of GPU driver