diff options
Diffstat (limited to 'mm/page_owner.c')
| -rw-r--r-- | mm/page_owner.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/page_owner.c b/mm/page_owner.c index 774b55623212..a57068cfe52f 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -6,6 +6,7 @@ #include <linux/stacktrace.h> #include <linux/page_owner.h> #include <linux/jump_label.h> +#include <linux/migrate.h> #include "internal.h" static bool page_owner_disabled = true; @@ -73,10 +74,18 @@ void __set_page_owner(struct page *page, unsigned int order, gfp_t gfp_mask) page_ext->order = order; page_ext->gfp_mask = gfp_mask; page_ext->nr_entries = trace.nr_entries; + page_ext->last_migrate_reason = -1; __set_bit(PAGE_EXT_OWNER, &page_ext->flags); } +void __set_page_owner_migrate_reason(struct page *page, int reason) +{ + struct page_ext *page_ext = lookup_page_ext(page); + + page_ext->last_migrate_reason = reason; +} + gfp_t __get_page_owner_gfp(struct page *page) { struct page_ext *page_ext = lookup_page_ext(page); @@ -151,6 +160,14 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn, if (ret >= count) goto err; + if (page_ext->last_migrate_reason != -1) { + ret += snprintf(kbuf + ret, count - ret, + "Page has been migrated, last migrate reason: %s\n", + migrate_reason_names[page_ext->last_migrate_reason]); + if (ret >= count) + goto err; + } + ret += snprintf(kbuf + ret, count - ret, "\n"); if (ret >= count) goto err; |