Zygo Blaxell d6f97edf4a crucible: fs: keep ioctl buffer between runs ...

perf blames the SEARCH_V2 ioctl wrapper for a lot of time spent in malloc.
Use a thread_local buffer for ioctl results, and reuse it between runs.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
(cherry picked from commit e509210428951e645d33916694a17aed1950991d)

2017-06-17 10:15:08 -04:00

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