add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/lib/show_mem.c
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@@ -1,14 +1,13 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Generic show_mem() implementation
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  *
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  * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
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- * All code subject to the GPL version 2.
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  */
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 #include <linux/mm.h>
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-#include <linux/quicklist.h>
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 #include <linux/cma.h>
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-
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+#include <trace/hooks/mm.h>
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 void show_mem(unsigned int filter, nodemask_t *nodemask)
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 {
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 	pg_data_t *pgdat;
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@@ -18,22 +17,19 @@
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 	show_free_areas(filter, nodemask);
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 	for_each_online_pgdat(pgdat) {
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-		unsigned long flags;
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 		int zoneid;
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-		pgdat_resize_lock(pgdat, &flags);
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 		for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
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 			struct zone *zone = &pgdat->node_zones[zoneid];
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 			if (!populated_zone(zone))
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 				continue;
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 			total += zone->present_pages;
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-			reserved += zone->present_pages - zone->managed_pages;
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+			reserved += zone->present_pages - zone_managed_pages(zone);
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 			if (is_highmem_idx(zoneid))
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 				highmem += zone->present_pages;
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 		}
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-		pgdat_resize_unlock(pgdat, &flags);
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 	}
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 	printk("%lu pages RAM\n", total);
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@@ -42,11 +38,9 @@
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 #ifdef CONFIG_CMA
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 	printk("%lu pages cma reserved\n", totalcma_pages);
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 #endif
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-#ifdef CONFIG_QUICKLIST
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-	printk("%lu pages in pagetable cache\n",
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-		quicklist_total_size());
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-#endif
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 #ifdef CONFIG_MEMORY_FAILURE
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 	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
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 #endif
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+	trace_android_vh_show_mem(filter, nodemask);
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 }
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+EXPORT_SYMBOL_GPL(show_mem);