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90572890d2
Change the per page last fault tracking to use cpu,pid instead of nid,pid. This will allow us to try and lookup the alternate task more easily. Note that even though it is the cpu that is store in the page flags that the mpol_misplaced decision is still based on the node. Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1381141781-10992-43-git-send-email-mgorman@suse.de [ Fixed build failure on 32-bit systems. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
207 lines
5.0 KiB
C
207 lines
5.0 KiB
C
/*
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* mm_init.c - Memory initialisation verification and debugging
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*
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* Copyright 2008 IBM Corporation, 2008
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* Author Mel Gorman <mel@csn.ul.ie>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/kobject.h>
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#include <linux/export.h>
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#include <linux/memory.h>
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#include <linux/notifier.h>
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#include "internal.h"
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#ifdef CONFIG_DEBUG_MEMORY_INIT
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int mminit_loglevel;
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#ifndef SECTIONS_SHIFT
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#define SECTIONS_SHIFT 0
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#endif
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/* The zonelists are simply reported, validation is manual. */
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void mminit_verify_zonelist(void)
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{
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int nid;
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if (mminit_loglevel < MMINIT_VERIFY)
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return;
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for_each_online_node(nid) {
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pg_data_t *pgdat = NODE_DATA(nid);
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struct zone *zone;
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struct zoneref *z;
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struct zonelist *zonelist;
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int i, listid, zoneid;
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BUG_ON(MAX_ZONELISTS > 2);
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for (i = 0; i < MAX_ZONELISTS * MAX_NR_ZONES; i++) {
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/* Identify the zone and nodelist */
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zoneid = i % MAX_NR_ZONES;
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listid = i / MAX_NR_ZONES;
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zonelist = &pgdat->node_zonelists[listid];
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zone = &pgdat->node_zones[zoneid];
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if (!populated_zone(zone))
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continue;
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/* Print information about the zonelist */
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printk(KERN_DEBUG "mminit::zonelist %s %d:%s = ",
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listid > 0 ? "thisnode" : "general", nid,
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zone->name);
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/* Iterate the zonelist */
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for_each_zone_zonelist(zone, z, zonelist, zoneid) {
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#ifdef CONFIG_NUMA
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printk(KERN_CONT "%d:%s ",
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zone->node, zone->name);
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#else
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printk(KERN_CONT "0:%s ", zone->name);
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#endif /* CONFIG_NUMA */
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}
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printk(KERN_CONT "\n");
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}
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}
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}
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void __init mminit_verify_pageflags_layout(void)
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{
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int shift, width;
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unsigned long or_mask, add_mask;
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shift = 8 * sizeof(unsigned long);
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width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_CPUPID_SHIFT;
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths",
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"Section %d Node %d Zone %d Lastcpupid %d Flags %d\n",
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SECTIONS_WIDTH,
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NODES_WIDTH,
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ZONES_WIDTH,
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LAST_CPUPID_WIDTH,
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NR_PAGEFLAGS);
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts",
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"Section %d Node %d Zone %d Lastcpupid %d\n",
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SECTIONS_SHIFT,
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NODES_SHIFT,
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ZONES_SHIFT,
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LAST_CPUPID_SHIFT);
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts",
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"Section %lu Node %lu Zone %lu Lastcpupid %lu\n",
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(unsigned long)SECTIONS_PGSHIFT,
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(unsigned long)NODES_PGSHIFT,
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(unsigned long)ZONES_PGSHIFT,
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(unsigned long)LAST_CPUPID_PGSHIFT);
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid",
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"Node/Zone ID: %lu -> %lu\n",
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(unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT),
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(unsigned long)ZONEID_PGOFF);
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_usage",
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"location: %d -> %d layout %d -> %d unused %d -> %d page-flags\n",
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shift, width, width, NR_PAGEFLAGS, NR_PAGEFLAGS, 0);
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#ifdef NODE_NOT_IN_PAGE_FLAGS
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags",
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"Node not in page flags");
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#endif
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#ifdef LAST_CPUPID_NOT_IN_PAGE_FLAGS
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mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags",
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"Last cpupid not in page flags");
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#endif
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if (SECTIONS_WIDTH) {
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shift -= SECTIONS_WIDTH;
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BUG_ON(shift != SECTIONS_PGSHIFT);
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}
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if (NODES_WIDTH) {
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shift -= NODES_WIDTH;
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BUG_ON(shift != NODES_PGSHIFT);
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}
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if (ZONES_WIDTH) {
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shift -= ZONES_WIDTH;
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BUG_ON(shift != ZONES_PGSHIFT);
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}
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/* Check for bitmask overlaps */
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or_mask = (ZONES_MASK << ZONES_PGSHIFT) |
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(NODES_MASK << NODES_PGSHIFT) |
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(SECTIONS_MASK << SECTIONS_PGSHIFT);
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add_mask = (ZONES_MASK << ZONES_PGSHIFT) +
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(NODES_MASK << NODES_PGSHIFT) +
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(SECTIONS_MASK << SECTIONS_PGSHIFT);
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BUG_ON(or_mask != add_mask);
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}
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void __meminit mminit_verify_page_links(struct page *page, enum zone_type zone,
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unsigned long nid, unsigned long pfn)
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{
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BUG_ON(page_to_nid(page) != nid);
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BUG_ON(page_zonenum(page) != zone);
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BUG_ON(page_to_pfn(page) != pfn);
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}
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static __init int set_mminit_loglevel(char *str)
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{
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get_option(&str, &mminit_loglevel);
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return 0;
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}
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early_param("mminit_loglevel", set_mminit_loglevel);
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#endif /* CONFIG_DEBUG_MEMORY_INIT */
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struct kobject *mm_kobj;
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EXPORT_SYMBOL_GPL(mm_kobj);
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#ifdef CONFIG_SMP
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s32 vm_committed_as_batch = 32;
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static void __meminit mm_compute_batch(void)
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{
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u64 memsized_batch;
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s32 nr = num_present_cpus();
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s32 batch = max_t(s32, nr*2, 32);
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/* batch size set to 0.4% of (total memory/#cpus), or max int32 */
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memsized_batch = min_t(u64, (totalram_pages/nr)/256, 0x7fffffff);
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vm_committed_as_batch = max_t(s32, memsized_batch, batch);
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}
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static int __meminit mm_compute_batch_notifier(struct notifier_block *self,
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unsigned long action, void *arg)
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{
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switch (action) {
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case MEM_ONLINE:
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case MEM_OFFLINE:
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mm_compute_batch();
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default:
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break;
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}
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return NOTIFY_OK;
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}
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static struct notifier_block compute_batch_nb __meminitdata = {
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.notifier_call = mm_compute_batch_notifier,
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.priority = IPC_CALLBACK_PRI, /* use lowest priority */
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};
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static int __init mm_compute_batch_init(void)
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{
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mm_compute_batch();
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register_hotmemory_notifier(&compute_batch_nb);
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return 0;
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}
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__initcall(mm_compute_batch_init);
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#endif
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static int __init mm_sysfs_init(void)
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{
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mm_kobj = kobject_create_and_add("mm", kernel_kobj);
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if (!mm_kobj)
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return -ENOMEM;
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return 0;
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}
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__initcall(mm_sysfs_init);
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