Merge "mm, page_owner: record time and pid" (e42afd75) · Commits · e / devices / android_kernel_fairphone_FP5

mm/page_owner.c

+12 −3

Original line number	Diff line number	Diff line
		@@ -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);