evie/android_kernel_oneplus_msm8998
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Merge "mm, page_owner: dump page owner info from dump_page()"

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Linux Build Service Account 2017-07-11 00:40:10 -07:00 • committed by Gerrit - the friendly Code Review server
commit 038a9502b1
4 changed files with 37 additions and 0 deletions
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9
include/linux/page_owner.h
View file

@ -13,6 +13,7 @@ extern void __set_page_owner(struct page *page,
extern gfp_t __get_page_owner_gfp(struct page *page);
extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
extern void __set_page_owner_migrate_reason(struct page *page, int reason);
extern void __dump_page_owner(struct page *page);
static inline void reset_page_owner(struct page *page, unsigned int order)
{
@ -44,6 +45,11 @@ static inline void set_page_owner_migrate_reason(struct page *page, int reason)
if (static_branch_unlikely(&page_owner_inited))
__set_page_owner_migrate_reason(page, reason);
}
static inline void dump_page_owner(struct page *page)
{
if (static_branch_unlikely(&page_owner_inited))
__dump_page_owner(page);
}
#else
static inline void reset_page_owner(struct page *page, unsigned int order)
{
@ -62,5 +68,8 @@ static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
static inline void set_page_owner_migrate_reason(struct page *page, int reason)
{
}
static inline void dump_page_owner(struct page *page)
{
}
#endif /* CONFIG_PAGE_OWNER */
#endif /* __LINUX_PAGE_OWNER_H */

2
mm/debug.c
View file

@ -10,6 +10,7 @@
#include <linux/trace_events.h>
#include <linux/memcontrol.h>
#include <linux/migrate.h>
#include <linux/page_owner.h>
char *migrate_reason_names[MR_TYPES] = {
"compaction",
@ -117,6 +118,7 @@ void dump_page_badflags(struct page *page, const char *reason,
void dump_page(struct page *page, const char *reason)
{
dump_page_badflags(page, reason, 0);
dump_page_owner(page);
}
EXPORT_SYMBOL(dump_page);

1
mm/page_alloc.c
View file

@ -473,6 +473,7 @@ static void bad_page(struct page *page, const char *reason,
printk(KERN_ALERT "BUG: Bad page state in process %s pfn:%05lx\n",
current->comm, page_to_pfn(page));
dump_page_badflags(page, reason, bad_flags);
dump_page_owner(page);
print_modules();
dump_stack();

25
mm/page_owner.c
View file

@ -187,6 +187,31 @@ err:
return -ENOMEM;
}
void __dump_page_owner(struct page *page)
{
struct page_ext *page_ext = lookup_page_ext(page);
struct stack_trace trace = {
.nr_entries = page_ext->nr_entries,
.entries = &page_ext->trace_entries[0],
};
gfp_t gfp_mask = page_ext->gfp_mask;
int mt = gfpflags_to_migratetype(gfp_mask);
if (!test_bit(PAGE_EXT_OWNER, &page_ext->flags)) {
pr_alert("page_owner info is not active (free page?)\n");
return;
}
pr_alert("page allocated via order %u, migratetype %s, "
"gfp_mask %#x(%pGg)\n", page_ext->order,
migratetype_names[mt], gfp_mask, &gfp_mask);
print_stack_trace(&trace, 0);
if (page_ext->last_migrate_reason != -1)
pr_alert("page has been migrated, last migrate reason: %s\n",
migrate_reason_names[page_ext->last_migrate_reason]);
}
static ssize_t
read_page_owner(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{