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show_mem() allows to filter out node specific data which is irrelevant to the allocation request via SHOW_MEM_FILTER_NODES. The filtering is done in skip_free_areas_node which skips all nodes which are not in the mems_allowed of the current process. This works most of the time as expected because the nodemask shouldn't be outside of the allocating task but there are some exceptions. E.g. memory hotplug might want to request allocations from outside of the allowed nodes (see new_node_page). Get rid of this hardcoded behavior and push the allocation mask down the show_mem path and use it instead of cpuset_current_mems_allowed. NULL nodemask is interpreted as cpuset_current_mems_allowed. [akpm@linux-foundation.org: coding-style fixes] Link: http://lkml.kernel.org/r/20170117091543.25850-5-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Mel Gorman <mgorman@suse.de> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
53 lines
1.3 KiB
C
53 lines
1.3 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/quicklist.h>
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#include <linux/cma.h>
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void show_mem(unsigned int filter, nodemask_t *nodemask)
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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, nodemask);
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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_CMA
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printk("%lu pages cma reserved\n", totalcma_pages);
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#endif
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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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