diff options
author | Nikita Danilov <nikita@clusterfs.com> | 2005-06-21 17:14:38 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 18:46:14 -0700 |
commit | 295ab93497ec703f7d6eaf0787dd9768b83035fe (patch) | |
tree | e3dce05d4cab0d7d3907a7357d37932c99ffd76d /mm/page_alloc.c | |
parent | 05b7438475ddbac47e75506913d44550f0e75938 (diff) | |
download | linux-stable-295ab93497ec703f7d6eaf0787dd9768b83035fe.tar.gz linux-stable-295ab93497ec703f7d6eaf0787dd9768b83035fe.tar.bz2 linux-stable-295ab93497ec703f7d6eaf0787dd9768b83035fe.zip |
[PATCH] mm: add /proc/zoneinfo
Add /proc/zoneinfo file to display information about memory zones. Useful
to analyze VM behaviour.
Signed-off-by: Nikita Danilov <nikita@clusterfs.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r-- | mm/page_alloc.c | 113 |
1 files changed, 111 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index b1061b1962f8..40169f0b7e9e 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1853,6 +1853,115 @@ struct seq_operations fragmentation_op = { .show = frag_show, }; +/* + * Output information about zones in @pgdat. + */ +static int zoneinfo_show(struct seq_file *m, void *arg) +{ + pg_data_t *pgdat = arg; + struct zone *zone; + struct zone *node_zones = pgdat->node_zones; + unsigned long flags; + + for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; zone++) { + int i; + + if (!zone->present_pages) + continue; + + spin_lock_irqsave(&zone->lock, flags); + seq_printf(m, "Node %d, zone %8s", pgdat->node_id, zone->name); + seq_printf(m, + "\n pages free %lu" + "\n min %lu" + "\n low %lu" + "\n high %lu" + "\n active %lu" + "\n inactive %lu" + "\n scanned %lu (a: %lu i: %lu)" + "\n spanned %lu" + "\n present %lu", + zone->free_pages, + zone->pages_min, + zone->pages_low, + zone->pages_high, + zone->nr_active, + zone->nr_inactive, + zone->pages_scanned, + zone->nr_scan_active, zone->nr_scan_inactive, + zone->spanned_pages, + zone->present_pages); + seq_printf(m, + "\n protection: (%lu", + zone->lowmem_reserve[0]); + for (i = 1; i < ARRAY_SIZE(zone->lowmem_reserve); i++) + seq_printf(m, ", %lu", zone->lowmem_reserve[i]); + seq_printf(m, + ")" + "\n pagesets"); + for (i = 0; i < ARRAY_SIZE(zone->pageset); i++) { + struct per_cpu_pageset *pageset; + int j; + + pageset = &zone->pageset[i]; + for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) { + if (pageset->pcp[j].count) + break; + } + if (j == ARRAY_SIZE(pageset->pcp)) + continue; + for (j = 0; j < ARRAY_SIZE(pageset->pcp); j++) { + seq_printf(m, + "\n cpu: %i pcp: %i" + "\n count: %i" + "\n low: %i" + "\n high: %i" + "\n batch: %i", + i, j, + pageset->pcp[j].count, + pageset->pcp[j].low, + pageset->pcp[j].high, + pageset->pcp[j].batch); + } +#ifdef CONFIG_NUMA + seq_printf(m, + "\n numa_hit: %lu" + "\n numa_miss: %lu" + "\n numa_foreign: %lu" + "\n interleave_hit: %lu" + "\n local_node: %lu" + "\n other_node: %lu", + pageset->numa_hit, + pageset->numa_miss, + pageset->numa_foreign, + pageset->interleave_hit, + pageset->local_node, + pageset->other_node); +#endif + } + seq_printf(m, + "\n all_unreclaimable: %u" + "\n prev_priority: %i" + "\n temp_priority: %i" + "\n start_pfn: %lu", + zone->all_unreclaimable, + zone->prev_priority, + zone->temp_priority, + zone->zone_start_pfn); + spin_unlock_irqrestore(&zone->lock, flags); + seq_putc(m, '\n'); + } + return 0; +} + +struct seq_operations zoneinfo_op = { + .start = frag_start, /* iterate over all zones. The same as in + * fragmentation. */ + .next = frag_next, + .stop = frag_stop, + .show = zoneinfo_show, +}; + static char *vmstat_text[] = { "nr_dirty", "nr_writeback", @@ -2058,10 +2167,10 @@ static void setup_per_zone_pages_min(void) min_pages = 128; zone->pages_min = min_pages; } else { - /* if it's a lowmem zone, reserve a number of pages + /* if it's a lowmem zone, reserve a number of pages * proportionate to the zone's size. */ - zone->pages_min = (pages_min * zone->present_pages) / + zone->pages_min = (pages_min * zone->present_pages) / lowmem_pages; } |