From hannes@saeurebad.de Fri Jun 27 23:21:01 2008 Date: Fri, 27 Jun 2008 23:17:06 +0200 From: Johannes Weiner To: Heiko Carstens Cc: Andrew Morton , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 02/20 fixed] mm: generic show_mem() This implements a platform-independent version of show_mem(). Signed-off-by: Johannes Weiner --- mm/Kconfig | 4 ++++ mm/page_alloc.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+) Heiko Carstens writes: >> +#ifdef CONFIG_HAVE_GENERIC_SHOW_MEM >> +void show_mem(void) >> +{ >> + pg_data_t *pgdat; >> + int total = 0, reserved = 0, shared = 0, nonshared = 0, highmem = 0; > > All of these should be unsigned long. Might overflow on very large > configurations otherwise. Thanks Heiko for pointing it out. quicklist_total_size() also returns UL so I fixed up the format character there as well. --- a/mm/Kconfig +++ b/mm/Kconfig @@ -205,3 +205,7 @@ config NR_QUICK config VIRT_TO_BUS def_bool y depends on !ARCH_NO_VIRT_TO_BUS + +config HAVE_GENERIC_SHOW_MEM + def_bool n + --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -45,6 +45,7 @@ #include #include #include +#include #include #include @@ -1896,6 +1897,61 @@ static void zoneref_set_zone(struct zone zoneref->zone_idx = zone_idx(zone); } +#ifdef CONFIG_HAVE_GENERIC_SHOW_MEM +void show_mem(void) +{ + pg_data_t *pgdat; + unsigned long total = 0, reserved = 0, shared = 0, + nonshared = 0, highmem = 0; + + printk(KERN_INFO "Mem-Info:\n"); + show_free_areas(); + + for_each_online_pgdat(pgdat) { + unsigned long i, flags; + + pgdat_resize_lock(pgdat, &flags); + for (i = 0; i < pgdat->node_spanned_pages; i++) { + struct page *page; + unsigned long pfn = pgdat->node_start_pfn + i; + + if (unlikely((i % MAX_ORDER_NR_PAGES) == 0)) + touch_nmi_watchdog(); + + if (!pfn_valid(pfn)) + continue; + + page = pfn_to_page(pfn); + + if (PageHighMem(page)) + highmem++; + + if (PageReserved(page)) + reserved++; + else if (page_count(page) == 1) + nonshared++; + else if (page_count(page) > 1) + shared += page_count(page) - 1; + + total++; + } + pgdat_resize_unlock(pgdat, &flags); + } + + printk(KERN_INFO "%lu pages RAM\n", total); +#ifdef CONFIG_HIGHMEM + printk(KERN_INFO "%lu pages HighMem\n", highmem); +#endif + printk(KERN_INFO "%lu pages reserved\n", reserved); + printk(KERN_INFO "%lu pages shared\n", shared); + printk(KERN_INFO "%lu pages non-shared\n", nonshared); +#ifdef CONFIG_QUICKLIST + printk(KERN_INFO "%lu pages in pagetable cache\n", + quicklist_total_size()); +#endif +} +#endif /* CONFIG_HAVE_GENERIC_SHOW_MEM */ + /* * Builds allocation fallback zone lists. *