From: Andrew Morton Date: Fri, 23 Jun 2006 09:03:47 +0000 (-0700) Subject: [PATCH] initialise total_memory() earlier X-Git-Tag: v2.6.18-rc1~1081^2~164 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bd1e22b8e0a90f9a91e4c27db14ca15773659bf7;p=linux-2.6 [PATCH] initialise total_memory() earlier Initialise total_memory earlier in boot. Because if for some reason we run page reclaim early in boot, we don't want total_memory to be zero when we use it as a divisor. And rename total_memory to vm_total_pages to avoid naming clashes with architectures. Cc: Yasunori Goto Cc: KAMEZAWA Hiroyuki Cc: Martin Bligh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/include/linux/swap.h b/include/linux/swap.h index f1a827a972..dc3f3aa0c8 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -185,6 +185,7 @@ extern unsigned long try_to_free_pages(struct zone **, gfp_t); extern unsigned long shrink_all_memory(unsigned long nr_pages); extern int vm_swappiness; extern int remove_mapping(struct address_space *mapping, struct page *page); +extern long vm_total_pages; #ifdef CONFIG_NUMA extern int zone_reclaim_mode; diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 5af33186a2..71a0b2a23f 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1725,9 +1725,9 @@ void __meminit build_all_zonelists(void) stop_machine_run(__build_all_zonelists, NULL, NR_CPUS); /* cpuset refresh routine should be here */ } - - printk("Built %i zonelists\n", num_online_nodes()); - + vm_total_pages = nr_free_pagecache_pages(); + printk("Built %i zonelists. Total pages: %ld\n", + num_online_nodes(), vm_total_pages); } /* diff --git a/mm/vmscan.c b/mm/vmscan.c index 71a02e2950..72babac71d 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -110,7 +110,7 @@ struct shrinker { * From 0 .. 100. Higher means more swappy. */ int vm_swappiness = 60; -static long total_memory; +long vm_total_pages; /* The total number of pages which the VM controls */ static LIST_HEAD(shrinker_list); static DECLARE_RWSEM(shrinker_rwsem); @@ -743,7 +743,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, * how much memory * is mapped. */ - mapped_ratio = (sc->nr_mapped * 100) / total_memory; + mapped_ratio = (sc->nr_mapped * 100) / vm_total_pages; /* * Now decide how much we really want to unmap some pages. The @@ -1482,7 +1482,6 @@ static int __init kswapd_init(void) pgdat->kswapd = find_task_by_pid(pid); read_unlock(&tasklist_lock); } - total_memory = nr_free_pagecache_pages(); hotcpu_notifier(cpu_callback, 0); return 0; }