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authorVlastimil Babka <vbabka@suse.cz>2018-10-26 15:05:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-10-26 16:26:32 -0700
commit61f94e18de94f79abaad3bb83549ff78923ac785 (patch)
treee76af5163ffc10843bf5d6c5e07a2078b2dd4b30 /fs
parentb29940c1abd7a4c3abeb926df0a5ec84d6902d47 (diff)
downloadlinux-61f94e18de94f79abaad3bb83549ff78923ac785.tar.bz2
mm, proc: add KReclaimable to /proc/meminfo
The vmstat NR_KERNEL_MISC_RECLAIMABLE counter is for kernel non-slab allocations that can be reclaimed via shrinker. In /proc/meminfo, we can show the sum of all reclaimable kernel allocations (including slab) as "KReclaimable". Add the same counter also to per-node meminfo under /sys With this counter, users will have more complete information about kernel memory usage. Non-slab reclaimable pages (currently just the ION allocator) will not be missing from /proc/meminfo, making users wonder where part of their memory went. More precisely, they already appear in MemAvailable, but without the new counter, it's not obvious why the value in MemAvailable doesn't fully correspond with the sum of other counters participating in it. Link: http://lkml.kernel.org/r/20180731090649.16028-6-vbabka@suse.cz Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: Roman Gushchin <guro@fb.com> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Vijayanand Jitta <vjitta@codeaurora.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/meminfo.c16
1 files changed, 8 insertions, 8 deletions
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index edda898714eb..568d90e17c17 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -38,6 +38,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
long cached;
long available;
unsigned long pages[NR_LRU_LISTS];
+ unsigned long sreclaimable, sunreclaim;
int lru;
si_meminfo(&i);
@@ -53,6 +54,8 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
available = si_mem_available();
+ sreclaimable = global_node_page_state(NR_SLAB_RECLAIMABLE);
+ sunreclaim = global_node_page_state(NR_SLAB_UNRECLAIMABLE);
show_val_kb(m, "MemTotal: ", i.totalram);
show_val_kb(m, "MemFree: ", i.freeram);
@@ -94,14 +97,11 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
show_val_kb(m, "Mapped: ",
global_node_page_state(NR_FILE_MAPPED));
show_val_kb(m, "Shmem: ", i.sharedram);
- show_val_kb(m, "Slab: ",
- global_node_page_state(NR_SLAB_RECLAIMABLE) +
- global_node_page_state(NR_SLAB_UNRECLAIMABLE));
-
- show_val_kb(m, "SReclaimable: ",
- global_node_page_state(NR_SLAB_RECLAIMABLE));
- show_val_kb(m, "SUnreclaim: ",
- global_node_page_state(NR_SLAB_UNRECLAIMABLE));
+ show_val_kb(m, "KReclaimable: ", sreclaimable +
+ global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
+ show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
+ show_val_kb(m, "SReclaimable: ", sreclaimable);
+ show_val_kb(m, "SUnreclaim: ", sunreclaim);
seq_printf(m, "KernelStack: %8lu kB\n",
global_zone_page_state(NR_KERNEL_STACK_KB));
show_val_kb(m, "PageTables: ",