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authorNamhyung Kim <namhyung@gmail.com>2011-08-11 10:36:05 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-08-11 10:36:05 +0200
commitc09c47caedc9854d59378d6e34c989e51cfdd2b4 (patch)
treead7de20c08092cdf1cbbb83625a76acab3b0e2ce /block
parent8e4bf84474960e832b56293c9b0674c88b5b05ce (diff)
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blktrace: add FLUSH/FUA support
Add FLUSH/FUA support to blktrace. As FLUSH precedes WRITE and/or FUA follows WRITE, use the same 'F' flag for both cases and distinguish them by their (relative) position. The end results look like (other flags might be shown also): - WRITE: W - WRITE_FLUSH: FW - WRITE_FUA: WF - WRITE_FLUSH_FUA: FWF Note that we reuse TC_BARRIER due to lack of bit space of act_mask so that the older versions of blktrace tools will report flush requests as barriers from now on. Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Namhyung Kim <namhyung@gmail.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
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