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dm mpath: pass IO start time to path selector

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The HST path selector needs this information to perform path
prediction. For request-based mpath, struct request's io_start_time_ns
is used, while for bio-based, use the start_time stored in dm_io.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Gabriel Krisman Bertazi
2020-04-30 16:48:29 -04:00
committed by Mike Snitzer
parent 48338daaa0
commit 087615bf3a
6 changed files with 20 additions and 6 deletions
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2
drivers/md/dm-path-selector.h
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@@ -74,7 +74,7 @@ struct path_selector_type {
int (*start_io) (struct path_selector *ps, struct dm_path *path,
size_t nr_bytes);
int (*end_io) (struct path_selector *ps, struct dm_path *path,
size_t nr_bytes);
size_t nr_bytes, u64 start_time);
};
/* Register a path selector */