diff options
| -rw-r--r-- | mm/Makefile | 2 | ||||
| -rw-r--r-- | mm/debug.c | 162 | ||||
| -rw-r--r-- | mm/page_alloc.c | 160 |
3 files changed, 163 insertions, 161 deletions
diff --git a/mm/Makefile b/mm/Makefile index fe7a053..f8ed7ab 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -18,7 +18,7 @@ obj-y := filemap.o mempool.o oom_kill.o \ mm_init.o mmu_context.o percpu.o slab_common.o \ compaction.o balloon_compaction.o vmacache.o \ interval_tree.o list_lru.o workingset.o \ - iov_iter.o $(mmu-y) + iov_iter.o debug.o $(mmu-y) obj-y += init-mm.o diff --git a/mm/debug.c b/mm/debug.c new file mode 100644 index 0000000..697df90 --- /dev/null +++ b/mm/debug.c @@ -0,0 +1,162 @@ +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/ftrace_event.h> +#include <linux/memcontrol.h> + +static const struct trace_print_flags pageflag_names[] = { + {1UL << PG_locked, "locked" }, + {1UL << PG_error, "error" }, + {1UL << PG_referenced, "referenced" }, + {1UL << PG_uptodate, "uptodate" }, + {1UL << PG_dirty, "dirty" }, + {1UL << PG_lru, "lru" }, + {1UL << PG_active, "active" }, + {1UL << PG_slab, "slab" }, + {1UL << PG_owner_priv_1, "owner_priv_1" }, + {1UL << PG_arch_1, "arch_1" }, + {1UL << PG_reserved, "reserved" }, + {1UL << PG_private, "private" }, + {1UL << PG_private_2, "private_2" }, + {1UL << PG_writeback, "writeback" }, +#ifdef CONFIG_PAGEFLAGS_EXTENDED + {1UL << PG_head, "head" }, + {1UL << PG_tail, "tail" }, +#else + {1UL << PG_compound, "compound" }, +#endif + {1UL << PG_swapcache, "swapcache" }, + {1UL << PG_mappedtodisk, "mappedtodisk" }, + {1UL << PG_reclaim, "reclaim" }, + {1UL << PG_swapbacked, "swapbacked" }, + {1UL << PG_unevictable, "unevictable" }, +#ifdef CONFIG_MMU + {1UL << PG_mlocked, "mlocked" }, +#endif +#ifdef CONFIG_ARCH_USES_PG_UNCACHED + {1UL << PG_uncached, "uncached" }, +#endif +#ifdef CONFIG_MEMORY_FAILURE + {1UL << PG_hwpoison, "hwpoison" }, +#endif +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + {1UL << PG_compound_lock, "compound_lock" }, +#endif +}; + +static void dump_flags(unsigned long flags, + const struct trace_print_flags *names, int count) +{ + const char *delim = ""; + unsigned long mask; + int i; + + printk(KERN_ALERT "flags: %#lx(", flags); + + /* remove zone id */ + flags &= (1UL << NR_PAGEFLAGS) - 1; + + for (i = 0; i < count && flags; i++) { + + mask = names[i].mask; + if ((flags & mask) != mask) + continue; + + flags &= ~mask; + printk("%s%s", delim, names[i].name); + delim = "|"; + } + + /* check for left over flags */ + if (flags) + printk("%s%#lx", delim, flags); + + printk(")\n"); +} + +void dump_page_badflags(struct page *page, const char *reason, + unsigned long badflags) +{ + printk(KERN_ALERT + "page:%p count:%d mapcount:%d mapping:%p index:%#lx\n", + page, atomic_read(&page->_count), page_mapcount(page), + page->mapping, page->index); + BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS); + dump_flags(page->flags, pageflag_names, ARRAY_SIZE(pageflag_names)); + if (reason) + pr_alert("page dumped because: %s\n", reason); + if (page->flags & badflags) { + pr_alert("bad because of flags:\n"); + dump_flags(page->flags & badflags, + pageflag_names, ARRAY_SIZE(pageflag_names)); + } + mem_cgroup_print_bad_page(page); +} + +void dump_page(struct page *page, const char *reason) +{ + dump_page_badflags(page, reason, 0); +} +EXPORT_SYMBOL(dump_page); + +#ifdef CONFIG_DEBUG_VM + +static const struct trace_print_flags vmaflags_names[] = { + {VM_READ, "read" }, + {VM_WRITE, "write" }, + {VM_EXEC, "exec" }, + {VM_SHARED, "shared" }, + {VM_MAYREAD, "mayread" }, + {VM_MAYWRITE, "maywrite" }, + {VM_MAYEXEC, "mayexec" }, + {VM_MAYSHARE, "mayshare" }, + {VM_GROWSDOWN, "growsdown" }, + {VM_PFNMAP, "pfnmap" }, + {VM_DENYWRITE, "denywrite" }, + {VM_LOCKED, "locked" }, + {VM_IO, "io" }, + {VM_SEQ_READ, "seqread" }, + {VM_RAND_READ, "randread" }, + {VM_DONTCOPY, "dontcopy" }, + {VM_DONTEXPAND, "dontexpand" }, + {VM_ACCOUNT, "account" }, + {VM_NORESERVE, "noreserve" }, + {VM_HUGETLB, "hugetlb" }, + {VM_NONLINEAR, "nonlinear" }, +#if defined(CONFIG_X86) + {VM_PAT, "pat" }, +#elif defined(CONFIG_PPC) + {VM_SAO, "sao" }, +#elif defined(CONFIG_PARISC) || defined(CONFIG_METAG) || defined(CONFIG_IA64) + {VM_GROWSUP, "growsup" }, +#elif !defined(CONFIG_MMU) + {VM_MAPPED_COPY, "mappedcopy" }, +#else + {VM_ARCH_1, "arch_1" }, +#endif + {VM_DONTDUMP, "dontdump" }, +#ifdef CONFIG_MEM_SOFT_DIRTY + {VM_SOFTDIRTY, "softdirty" }, +#endif + {VM_MIXEDMAP, "mixedmap" }, + {VM_HUGEPAGE, "hugepage" }, + {VM_NOHUGEPAGE, "nohugepage" }, + {VM_MERGEABLE, "mergeable" }, +}; + +void dump_vma(const struct vm_area_struct *vma) +{ + printk(KERN_ALERT + "vma %p start %p end %p\n" + "next %p prev %p mm %p\n" + "prot %lx anon_vma %p vm_ops %p\n" + "pgoff %lx file %p private_data %p\n", + vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, + vma->vm_prev, vma->vm_mm, + (unsigned long)pgprot_val(vma->vm_page_prot), + vma->anon_vma, vma->vm_ops, vma->vm_pgoff, + vma->vm_file, vma->vm_private_data); + dump_flags(vma->vm_flags, vmaflags_names, ARRAY_SIZE(vmaflags_names)); +} +EXPORT_SYMBOL(dump_vma); + +#endif /* CONFIG_DEBUG_VM */ diff --git a/mm/page_alloc.c b/mm/page_alloc.c index bfb73e0..c9710c9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -53,8 +53,6 @@ #include <linux/kmemleak.h> #include <linux/compaction.h> #include <trace/events/kmem.h> -#include <linux/ftrace_event.h> -#include <linux/memcontrol.h> #include <linux/prefetch.h> #include <linux/mm_inline.h> #include <linux/migrate.h> @@ -6550,161 +6548,3 @@ bool is_free_buddy_page(struct page *page) return order < MAX_ORDER; } #endif - -static const struct trace_print_flags pageflag_names[] = { - {1UL << PG_locked, "locked" }, - {1UL << PG_error, "error" }, - {1UL << PG_referenced, "referenced" }, - {1UL << PG_uptodate, "uptodate" }, - {1UL << PG_dirty, "dirty" }, - {1UL << PG_lru, "lru" }, - {1UL << PG_active, "active" }, - {1UL << PG_slab, "slab" }, - {1UL << PG_owner_priv_1, "owner_priv_1" }, - {1UL << PG_arch_1, "arch_1" }, - {1UL << PG_reserved, "reserved" }, - {1UL << PG_private, "private" }, - {1UL << PG_private_2, "private_2" }, - {1UL << PG_writeback, "writeback" }, -#ifdef CONFIG_PAGEFLAGS_EXTENDED - {1UL << PG_head, "head" }, - {1UL << PG_tail, "tail" }, -#else - {1UL << PG_compound, "compound" }, -#endif - {1UL << PG_swapcache, "swapcache" }, - {1UL << PG_mappedtodisk, "mappedtodisk" }, - {1UL << PG_reclaim, "reclaim" }, - {1UL << PG_swapbacked, "swapbacked" }, - {1UL << PG_unevictable, "unevictable" }, -#ifdef CONFIG_MMU - {1UL << PG_mlocked, "mlocked" }, -#endif -#ifdef CONFIG_ARCH_USES_PG_UNCACHED - {1UL << PG_uncached, "uncached" }, -#endif -#ifdef CONFIG_MEMORY_FAILURE - {1UL << PG_hwpoison, "hwpoison" }, -#endif -#ifdef CONFIG_TRANSPARENT_HUGEPAGE - {1UL << PG_compound_lock, "compound_lock" }, -#endif -}; - -static void dump_flags(unsigned long flags, - const struct trace_print_flags *names, int count) -{ - const char *delim = ""; - unsigned long mask; - int i; - - printk(KERN_ALERT "flags: %#lx(", flags); - - /* remove zone id */ - flags &= (1UL << NR_PAGEFLAGS) - 1; - - for (i = 0; i < count && flags; i++) { - - mask = names[i].mask; - if ((flags & mask) != mask) - continue; - - flags &= ~mask; - printk("%s%s", delim, names[i].name); - delim = "|"; - } - - /* check for left over flags */ - if (flags) - printk("%s%#lx", delim, flags); - - printk(")\n"); -} - -void dump_page_badflags(struct page *page, const char *reason, - unsigned long badflags) -{ - printk(KERN_ALERT - "page:%p count:%d mapcount:%d mapping:%p index:%#lx\n", - page, atomic_read(&page->_count), page_mapcount(page), - page->mapping, page->index); - BUILD_BUG_ON(ARRAY_SIZE(pageflag_names) != __NR_PAGEFLAGS); - dump_flags(page->flags, pageflag_names, ARRAY_SIZE(pageflag_names)); - if (reason) - pr_alert("page dumped because: %s\n", reason); - if (page->flags & badflags) { - pr_alert("bad because of flags:\n"); - dump_flags(page->flags & badflags, - pageflag_names, ARRAY_SIZE(pageflag_names)); - } - mem_cgroup_print_bad_page(page); -} - -void dump_page(struct page *page, const char *reason) -{ - dump_page_badflags(page, reason, 0); -} -EXPORT_SYMBOL(dump_page); - -#ifdef CONFIG_DEBUG_VM - -static const struct trace_print_flags vmaflags_names[] = { - {VM_READ, "read" }, - {VM_WRITE, "write" }, - {VM_EXEC, "exec" }, - {VM_SHARED, "shared" }, - {VM_MAYREAD, "mayread" }, - {VM_MAYWRITE, "maywrite" }, - {VM_MAYEXEC, "mayexec" }, - {VM_MAYSHARE, "mayshare" }, - {VM_GROWSDOWN, "growsdown" }, - {VM_PFNMAP, "pfnmap" }, - {VM_DENYWRITE, "denywrite" }, - {VM_LOCKED, "locked" }, - {VM_IO, "io" }, - {VM_SEQ_READ, "seqread" }, - {VM_RAND_READ, "randread" }, - {VM_DONTCOPY, "dontcopy" }, - {VM_DONTEXPAND, "dontexpand" }, - {VM_ACCOUNT, "account" }, - {VM_NORESERVE, "noreserve" }, - {VM_HUGETLB, "hugetlb" }, - {VM_NONLINEAR, "nonlinear" }, -#if defined(CONFIG_X86) - {VM_PAT, "pat" }, -#elif defined(CONFIG_PPC) - {VM_SAO, "sao" }, -#elif defined(CONFIG_PARISC) || defined(CONFIG_METAG) || defined(CONFIG_IA64) - {VM_GROWSUP, "growsup" }, -#elif !defined(CONFIG_MMU) - {VM_MAPPED_COPY, "mappedcopy" }, -#else - {VM_ARCH_1, "arch_1" }, -#endif - {VM_DONTDUMP, "dontdump" }, -#ifdef CONFIG_MEM_SOFT_DIRTY - {VM_SOFTDIRTY, "softdirty" }, -#endif - {VM_MIXEDMAP, "mixedmap" }, - {VM_HUGEPAGE, "hugepage" }, - {VM_NOHUGEPAGE, "nohugepage" }, - {VM_MERGEABLE, "mergeable" }, -}; - -void dump_vma(const struct vm_area_struct *vma) -{ - printk(KERN_ALERT - "vma %p start %p end %p\n" - "next %p prev %p mm %p\n" - "prot %lx anon_vma %p vm_ops %p\n" - "pgoff %lx file %p private_data %p\n", - vma, (void *)vma->vm_start, (void *)vma->vm_end, vma->vm_next, - vma->vm_prev, vma->vm_mm, - (unsigned long)pgprot_val(vma->vm_page_prot), - vma->anon_vma, vma->vm_ops, vma->vm_pgoff, - vma->vm_file, vma->vm_private_data); - dump_flags(vma->vm_flags, vmaflags_names, ARRAY_SIZE(vmaflags_names)); -} -EXPORT_SYMBOL(dump_vma); - -#endif /* CONFIG_DEBUG_VM */ |
