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@xxxxxxx> CC: Jens Axboe<jens.axboe@xxxxxxxxxx> CC: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> Signed-off-by: Wu Fengguang<fengguang.wu@xxxxxxxxx>
Acked-by: Rik van Riel <riel@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html