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authorDave Hansen <dave@linux.vnet.ibm.com>2011-03-22 16:33:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-22 17:44:04 -0700
commit4031a219d8913da40ade5a6e5b538cc61e975cc8 (patch)
treeead7acfa743ef31f5be6dc9cae1fc70cefd72bf0
parent22e057c5923e60debad318cbeaee33033b110bc8 (diff)
downloadop-kernel-dev-4031a219d8913da40ade5a6e5b538cc61e975cc8.zip
op-kernel-dev-4031a219d8913da40ade5a6e5b538cc61e975cc8.tar.gz
smaps: have smaps show transparent huge pages
Now that the mere act of _looking_ at /proc/$pid/smaps will not destroy transparent huge pages, tell how much of the VMA is actually mapped with them. This way, we can make sure that we're getting THPs where we expect to see them. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: Eric B Munson <emunson@mgebm.net> Tested-by: Eric B Munson <emunson@mgebm.net> Cc: Michael J Wolf <mjwolf@us.ibm.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/task_mmu.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 26f9cc0..93381aa 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -331,6 +331,7 @@ struct mem_size_stats {
unsigned long private_dirty;
unsigned long referenced;
unsigned long anonymous;
+ unsigned long anonymous_thp;
unsigned long swap;
u64 pss;
};
@@ -396,6 +397,7 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
smaps_pte_entry(*(pte_t *)pmd, addr,
HPAGE_PMD_SIZE, walk);
spin_unlock(&walk->mm->page_table_lock);
+ mss->anonymous_thp += HPAGE_PMD_SIZE;
return 0;
}
} else {
@@ -444,6 +446,7 @@ static int show_smap(struct seq_file *m, void *v)
"Private_Dirty: %8lu kB\n"
"Referenced: %8lu kB\n"
"Anonymous: %8lu kB\n"
+ "AnonHugePages: %8lu kB\n"
"Swap: %8lu kB\n"
"KernelPageSize: %8lu kB\n"
"MMUPageSize: %8lu kB\n"
@@ -457,6 +460,7 @@ static int show_smap(struct seq_file *m, void *v)
mss.private_dirty >> 10,
mss.referenced >> 10,
mss.anonymous >> 10,
+ mss.anonymous_thp >> 10,
mss.swap >> 10,
vma_kernel_pagesize(vma) >> 10,
vma_mmu_pagesize(vma) >> 10,
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