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https://github.com/torvalds/linux
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25487d73a9
Show num_poisoned_pages when oom, it is a little helpful to find the reason. Also it will be emitted anytime show_mem() is called. Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Suggested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Michal Hocko <mhocko@suse.cz> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
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* Generic show_mem() implementation
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*
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* Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
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* All code subject to the GPL version 2.
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*/
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#include <linux/mm.h>
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#include <linux/nmi.h>
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#include <linux/quicklist.h>
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void show_mem(unsigned int filter)
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{
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pg_data_t *pgdat;
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unsigned long total = 0, reserved = 0, highmem = 0;
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printk("Mem-Info:\n");
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show_free_areas(filter);
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for_each_online_pgdat(pgdat) {
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unsigned long flags;
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int zoneid;
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pgdat_resize_lock(pgdat, &flags);
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for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
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struct zone *zone = &pgdat->node_zones[zoneid];
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if (!populated_zone(zone))
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continue;
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total += zone->present_pages;
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reserved = zone->present_pages - zone->managed_pages;
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if (is_highmem_idx(zoneid))
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highmem += zone->present_pages;
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}
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pgdat_resize_unlock(pgdat, &flags);
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}
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printk("%lu pages RAM\n", total);
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printk("%lu pages HighMem/MovableOnly\n", highmem);
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printk("%lu pages reserved\n", reserved);
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#ifdef CONFIG_QUICKLIST
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printk("%lu pages in pagetable cache\n",
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quicklist_total_size());
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#endif
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#ifdef CONFIG_MEMORY_FAILURE
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printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
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#endif
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}
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