From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Schermerhorn Date: Fri, 14 Sep 2007 16:54:44 -0400 Message-Id: <20070914205444.6536.78981.sendpatchset@localhost> In-Reply-To: <20070914205359.6536.98017.sendpatchset@localhost> References: <20070914205359.6536.98017.sendpatchset@localhost> Subject: [PATCH/RFC 7/14] Reclaim Scalability: Non-reclaimable page statistics Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org Cc: akpm@linux-foundation.org, mel@csn.ul.ie, clameter@sgi.com, riel@redhat.com, balbir@linux.vnet.ibm.com, andrea@suse.de, a.p.zijlstra@chello.nl, eric.whitney@hp.com, npiggin@suse.de List-ID: PATCH/RFC 07/14 Reclaim Scalability: Non-reclaimable page statistics Against: 2.6.23-rc4-mm1 Report non-reclaimable pages per zone and system wide. Note: may want to track/report some specific reasons for nonreclaimability for deciding when to splice the noreclaim lists back to the normal lru. That will be tricky, especially in shrink_active_list(), where we'd need someplace to save the per page reason for non-reclaimability until the pages are dumped back onto the noreclaim list from the pagevec. Note: my tests indicate that NR_NORECLAIM and probably the other LRU stats aren't being maintained properly--especially with large amounts of mlocked memory and the mlock patch in this series installed. Can't be sure of this, as I don't know why the pages are on the noreclaim list. Needs further investigation. Signed-off-by: Lee Schermerhorn drivers/base/node.c | 6 ++++++ fs/proc/proc_misc.c | 6 ++++++ mm/page_alloc.c | 16 +++++++++++++++- mm/vmstat.c | 3 +++ 4 files changed, 30 insertions(+), 1 deletion(-) Index: Linux/mm/page_alloc.c =================================================================== --- Linux.orig/mm/page_alloc.c 2007-09-14 10:22:05.000000000 -0400 +++ Linux/mm/page_alloc.c 2007-09-14 10:23:49.000000000 -0400 @@ -1913,10 +1913,18 @@ void show_free_areas(void) } } - printk("Active:%lu inactive:%lu dirty:%lu writeback:%lu unstable:%lu\n" +//TODO: check/adjust line lengths + printk("Active:%lu inactive:%lu" +#ifdef CONFIG_NORECLAIM + " noreclaim:%lu" +#endif + " dirty:%lu writeback:%lu unstable:%lu\n" " free:%lu slab:%lu mapped:%lu pagetables:%lu bounce:%lu\n", global_page_state(NR_ACTIVE), global_page_state(NR_INACTIVE), +#ifdef CONFIG_NORECLAIM + global_page_state(NR_NORECLAIM), +#endif global_page_state(NR_FILE_DIRTY), global_page_state(NR_WRITEBACK), global_page_state(NR_UNSTABLE_NFS), @@ -1941,6 +1949,9 @@ void show_free_areas(void) " high:%lukB" " active:%lukB" " inactive:%lukB" +#ifdef CONFIG_NORECLAIM + " noreclaim:%lukB" +#endif " present:%lukB" " pages_scanned:%lu" " all_unreclaimable? %s" @@ -1952,6 +1963,9 @@ void show_free_areas(void) K(zone->pages_high), K(zone_page_state(zone, NR_ACTIVE)), K(zone_page_state(zone, NR_INACTIVE)), +#ifdef CONFIG_NORECLAIM + K(zone_page_state(zone, NR_NORECLAIM)), +#endif K(zone->present_pages), zone->pages_scanned, (zone->all_unreclaimable ? "yes" : "no") Index: Linux/mm/vmstat.c =================================================================== --- Linux.orig/mm/vmstat.c 2007-09-14 10:22:05.000000000 -0400 +++ Linux/mm/vmstat.c 2007-09-14 10:23:49.000000000 -0400 @@ -686,6 +686,9 @@ static const char * const vmstat_text[] "nr_free_pages", "nr_inactive", "nr_active", +#ifdef CONFIG_NORECLAIM + "nr_noreclaim", +#endif "nr_anon_pages", "nr_mapped", "nr_file_pages", Index: Linux/drivers/base/node.c =================================================================== --- Linux.orig/drivers/base/node.c 2007-09-14 10:22:05.000000000 -0400 +++ Linux/drivers/base/node.c 2007-09-14 10:23:49.000000000 -0400 @@ -49,6 +49,9 @@ static ssize_t node_read_meminfo(struct "Node %d MemUsed: %8lu kB\n" "Node %d Active: %8lu kB\n" "Node %d Inactive: %8lu kB\n" +#ifdef CONFIG_NORECLAIM + "Node %d Noreclaim: %8lu kB\n" +#endif #ifdef CONFIG_HIGHMEM "Node %d HighTotal: %8lu kB\n" "Node %d HighFree: %8lu kB\n" @@ -71,6 +74,9 @@ static ssize_t node_read_meminfo(struct nid, K(i.totalram - i.freeram), nid, node_page_state(nid, NR_ACTIVE), nid, node_page_state(nid, NR_INACTIVE), +#ifdef CONFIG_NORECLAIM + nid, node_page_state(nid, NR_NORECLAIM), +#endif #ifdef CONFIG_HIGHMEM nid, K(i.totalhigh), nid, K(i.freehigh), Index: Linux/fs/proc/proc_misc.c =================================================================== --- Linux.orig/fs/proc/proc_misc.c 2007-09-14 10:22:05.000000000 -0400 +++ Linux/fs/proc/proc_misc.c 2007-09-14 10:23:49.000000000 -0400 @@ -157,6 +157,9 @@ static int meminfo_read_proc(char *page, "SwapCached: %8lu kB\n" "Active: %8lu kB\n" "Inactive: %8lu kB\n" +#ifdef CONFIG_NORECLAIM + "Noreclaim: %8lu kB\n" +#endif #ifdef CONFIG_HIGHMEM "HighTotal: %8lu kB\n" "HighFree: %8lu kB\n" @@ -187,6 +190,9 @@ static int meminfo_read_proc(char *page, K(total_swapcache_pages), K(global_page_state(NR_ACTIVE)), K(global_page_state(NR_INACTIVE)), +#ifdef CONFIG_NORECLAIM + K(global_page_state(NR_NORECLAIM)), +#endif #ifdef CONFIG_HIGHMEM K(i.totalhigh), K(i.freehigh), -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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