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| author | Alex Chiang <achiang@hp.com> | 2009-12-14 17:57:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 08:53:11 -0800 |
| commit | bb86a7338b7a864c03e1736a8d370b10254b0300 (patch) | |
| tree | d671c0725c2332df2a2180b64a7b5957aef7b59b /Documentation/vm | |
| parent | 9fdcd886ab407dbe3f854579417e6b036222a468 (diff) | |
| download | linux-bb86a7338b7a864c03e1736a8d370b10254b0300.tar.gz | |
page-types: exit early when invoked with -d|--describe
On a system with large amount of memory (256GB), invoking page-types can take quite a long time, which is unreasonable considering the user only wants a description of the flags: # time ./page-types -d 0x10 0x0000000000000010 ____D_____________________________ dirty real 0m34.285s user 0m1.966s sys 0m32.313s This is because we still walk the entire address range. Exiting early seems like a reasonble solution: # time ./page-types -d 0x10 0x0000000000000010 ____D_____________________________ dirty real 0m0.007s user 0m0.001s sys 0m0.005s Signed-off-by: Alex Chiang <achiang@hp.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Haicheng Li <haicheng.li@intel.com> Acked-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/page-types.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/vm/page-types.c b/Documentation/vm/page-types.c index 19ca23c773a6..7a7d9bab32ef 100644 --- a/Documentation/vm/page-types.c +++ b/Documentation/vm/page-types.c @@ -940,9 +940,8 @@ int main(int argc, char *argv[]) parse_bits_mask(optarg); break; case 'd': - opt_no_summary = 1; describe_flags(optarg); - break; + exit(0); case 'l': opt_list = 1; break; |