Messages in this thread | | | Date | Thu, 25 Feb 2010 17:37:31 -0500 | From | Rik van Riel <> | Subject | Re: [PATCH 08/15] readahead: record readahead patterns |
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On 02/23/2010 10:10 PM, Wu Fengguang wrote: > Record the readahead pattern in ra_flags. This info can be examined by > users via the readahead tracing/stats interfaces. > > Currently 7 patterns are defined: > > pattern readahead for > ----------------------------------------------------------- > RA_PATTERN_INITIAL start-of-file/oversize read > RA_PATTERN_SUBSEQUENT trivial sequential read > RA_PATTERN_CONTEXT interleaved sequential read > RA_PATTERN_THRASH thrashed sequential read > RA_PATTERN_MMAP_AROUND mmap fault > RA_PATTERN_FADVISE posix_fadvise() > RA_PATTERN_RANDOM random read > > CC: Ingo Molnar<mingo@elte.hu> > CC: Jens Axboe<jens.axboe@oracle.com> > CC: Peter Zijlstra<a.p.zijlstra@chello.nl> > Signed-off-by: Wu Fengguang<fengguang.wu@intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
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