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| author | Luden <luden@ghostmail.com> | 2016-02-13 23:54:06 +0100 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-05-01 23:35:56 +0200 |
| commit | c3f47a7451568ae3d3e33f75666fc37439794223 (patch) | |
| tree | 3149c6015cd4157361a44d0fa863464d68d9be9d /mm/page_isolation.c | |
| parent | ab26843c057773f42f5b46e4e4a519b39707253e (diff) | |
| download | kernel_samsung_tuna-c3f47a7451568ae3d3e33f75666fc37439794223.zip kernel_samsung_tuna-c3f47a7451568ae3d3e33f75666fc37439794223.tar.gz kernel_samsung_tuna-c3f47a7451568ae3d3e33f75666fc37439794223.tar.bz2 | |
Extra CMA debugging code.
Added extra CMA debugging logging into FS, compaction, isolation
and migration code. This makes it easier to see which parts of the
kernel are responsible for the most migration failures.
Diffstat (limited to 'mm/page_isolation.c')
| -rw-r--r-- | mm/page_isolation.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/mm/page_isolation.c b/mm/page_isolation.c index c9f0477..fbf6f75 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -5,8 +5,19 @@ #include <linux/mm.h> #include <linux/page-isolation.h> #include <linux/pageblock-flags.h> +#include <linux/ksm.h> #include "internal.h" +#ifdef CONFIG_CMA_DEBUG_VERBOSE +void print_cma_page_stats(struct page *page) +{ + pr_err("page: phys = 0x%x, count = %d, order = %lu, private = %ld\n", page_to_phys(page), page_count(page), page_order(page), page_private(page)); + pr_err("page: buddy = %d, LRU = %d, KSM = %d, mapping = 0x%p, map count = %d\n", PageBuddy(page), PageLRU(page), PageKsm(page), page->mapping, atomic_read(&page->_mapcount)); + pr_err("page: index = 0x%lx, anon = %d, writeback = %d, dirty = %d, swap cache = %d\n", page->index, PageAnon(page), PageWriteback(page), PageDirty(page), PageSwapCache(page)); + pr_err("pageblock: migratetype = 0x%x, flags = 0x%lx\n", get_pageblock_migratetype(page), get_pageblock_flags(page)); +} +#endif + static inline struct page * __first_valid_page(unsigned long pfn, unsigned long nr_pages) { @@ -108,8 +119,12 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn) else break; } - if (pfn < end_pfn) + if (pfn < end_pfn) { +#ifdef CONFIG_CMA_DEBUG_VERBOSE + print_cma_page_stats(pfn_to_page(pfn)); +#endif return 0; + } return 1; } |