Merge "mm, page_owner: record time and pid" (66003ae8) · Commits · e / devices / android_kernel_fairphone_FP4

mm/page_owner.c

+14 −4

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"

		@@ -24,6 +26,8 @@ struct page_owner {
		short last_migrate_reason;
		gfp_t gfp_mask;
		depot_stack_handle_t handle;
		int pid;
		u64 ts_nsec;
		};

		static bool page_owner_disabled =
		@@ -183,6 +187,8 @@ static inline void __set_page_owner_handle(struct page_ext *page_ext,
		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);
		}
		@@ -243,6 +249,8 @@ 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
		@@ -360,9 +368,10 @@ 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;
		@@ -445,8 +454,9 @@ void __dump_page_owner(struct page *page)
		}

		depot_fetch_stack(handle, &trace);
		pr_alert("page allocated via order %u, migratetype %s, gfp_mask %#x(%pGg)\n",
		page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask);
		pr_alert("page 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,
		page_owner->pid, page_owner->ts_nsec);
		print_stack_trace(&trace, 0);

		if (page_owner->last_migrate_reason != -1)