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| author | Mel Gorman <mel@csn.ul.ie> | 2009-01-06 14:38:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:58:58 -0800 |
| commit | 08fba69986e20c1c9e5fe2e6064d146cc4f42480 (patch) | |
| tree | 40bd36a6778624527d91ede0eb51aa5b99aab01c /fs | |
| parent | 238c6d54830c624f34ac9cf123ac04aebfca5013 (diff) | |
| download | talos-op-linux-08fba69986e20c1c9e5fe2e6064d146cc4f42480.tar.gz talos-op-linux-08fba69986e20c1c9e5fe2e6064d146cc4f42480.zip | |
mm: report the pagesize backing a VMA in /proc/pid/smaps
It is useful to verify a hugepage-aware application is using the expected
pagesizes for its memory regions. This patch creates an entry called
KernelPageSize in /proc/pid/smaps that is the size of page used by the
kernel to back a VMA. The entry is not called PageSize as it is possible
the MMU uses a different size. This extension should not break any sensible
parser that skips lines containing unrecognised information.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Acked-by: "KOSAKI Motohiro" <kosaki.motohiro@jp.fujitsu.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
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/task_mmu.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 3a8bdd7f5756..41ef5f23e779 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -396,7 +396,8 @@ static int show_smap(struct seq_file *m, void *v) "Private_Clean: %8lu kB\n" "Private_Dirty: %8lu kB\n" "Referenced: %8lu kB\n" - "Swap: %8lu kB\n", + "Swap: %8lu kB\n" + "KernelPageSize: %8lu kB\n", (vma->vm_end - vma->vm_start) >> 10, mss.resident >> 10, (unsigned long)(mss.pss >> (10 + PSS_SHIFT)), @@ -405,7 +406,8 @@ static int show_smap(struct seq_file *m, void *v) mss.private_clean >> 10, mss.private_dirty >> 10, mss.referenced >> 10, - mss.swap >> 10); + mss.swap >> 10, + vma_kernel_pagesize(vma) >> 10); if (m->count < m->size) /* vma is copied successfully */ m->version = (vma != get_gate_vma(task)) ? vma->vm_start : 0; |
