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Merge "mm, page_owner: record time and pid"

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qctecmdr 2019-12-09 14:12:05 -08:00 • committed by Gerrit - the friendly Code Review server
commit e42afd755e
1 changed files with 12 additions and 3 deletions
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15
mm/page_owner.c
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@ -10,6 +10,8 @@
#include <linux/migrate.h>
#include <linux/stackdepot.h>
#include <linux/seq_file.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
#include "internal.h"
@ -25,6 +27,8 @@ struct page_owner {
gfp_t gfp_mask;
depot_stack_handle_t handle;
depot_stack_handle_t free_handle;
int pid;
u64 ts_nsec;
};
static bool page_owner_enabled = IS_ENABLED(CONFIG_PAGE_OWNER_ENABLE_DEFAULT);
@ -175,6 +179,8 @@ static inline void __set_page_owner_handle(struct page *page,
page_owner->order = order;
page_owner->gfp_mask = gfp_mask;
page_owner->last_migrate_reason = -1;
page_owner->pid = current->pid;
page_owner->ts_nsec = local_clock();
__set_bit(PAGE_EXT_OWNER, &page_ext->flags);
__set_bit(PAGE_EXT_OWNER_ALLOCATED, &page_ext->flags);
@ -239,6 +245,8 @@ void __copy_page_owner(struct page *oldpage, struct page *newpage)
new_page_owner->last_migrate_reason =
old_page_owner->last_migrate_reason;
new_page_owner->handle = old_page_owner->handle;
new_page_owner->pid = old_page_owner->pid;
new_page_owner->ts_nsec = old_page_owner->ts_nsec;
/*
* We don't clear the bit on the oldpage as it's going to be freed
@ -353,9 +361,10 @@ print_page_owner(char __user *buf, size_t count, unsigned long pfn,
return -ENOMEM;
ret = snprintf(kbuf, count,
"Page allocated via order %u, mask %#x(%pGg)\n",
"Page allocated via order %u, mask %#x(%pGg), pid %d, ts %llu ns\n",
page_owner->order, page_owner->gfp_mask,
&page_owner->gfp_mask);
&page_owner->gfp_mask, page_owner->pid,
page_owner->ts_nsec);
if (ret >= count)
goto err;
@ -431,7 +440,7 @@ void __dump_page_owner(struct page *page)
else
pr_alert("page_owner tracks the page as freed\n");
pr_alert("page last allocated via order %u, migratetype %s, gfp_mask %#x(%pGg)\n",
pr_alert("page last allocated via order %u, migratetype %s, gfp_mask %#x(%pGg), pid %d, ts %llu ns\n",
page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask);
handle = READ_ONCE(page_owner->handle);