[PATCH 2/2] mm/page_owner: determine the last stack state of page with CONFIG_KASAN_DUMP_PAGE=y
From: Walter Wu <hidden>
Date: 2019-09-04 06:57:43
Also in:
linux-mediatek, linux-mm, lkml
Subsystem:
memory management, memory management - page allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Linus Torvalds
When enable CONFIG_KASAN_DUMP_PAGE, then page_owner will record last stack, So we need to know the last stack is allocation or free state. Signed-off-by: Walter Wu <redacted> --- mm/page_owner.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/page_owner.c b/mm/page_owner.c
index addcbb2ae4e4..2756adca250e 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c@@ -418,6 +418,12 @@ void __dump_page_owner(struct page *page) nr_entries = stack_depot_fetch(handle, &entries); pr_alert("page allocated via order %u, migratetype %s, gfp_mask %#x(%pGg)\n", page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask); +#ifdef CONFIG_KASAN_DUMP_PAGE + if ((unsigned long)page->flags & PAGE_FLAGS_CHECK_AT_PREP) + pr_info("Allocation stack of page:\n"); + else + pr_info("Free stack of page:\n"); +#endif stack_trace_print(entries, nr_entries, 0); if (page_owner->last_migrate_reason != -1)
--
2.18.0
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