diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2012-06-03 00:29:43 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-06-03 00:29:43 +0100 |
| commit | 1fbdd2b3a3cf77f77b0cdf25dd969241ea2c0ce1 (patch) | |
| tree | 935f78f27afba09ec1784f5bac96454b43ed718a /drivers/md | |
| parent | 76e10d158efb6d4516018846f60c2ab5501900bc (diff) | |
dm mpath: reduce size of struct multipath
Move multipath structure's 'lock' and 'queue_size' members to eliminate
two 4-byte holes. Also use a bit within a single unsigned int for each
existing flag (saves 8-bytes). This allows future flags to be added
without each consuming an unsigned int.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-mpath.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 754f38f8a692..c35160786cf4 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -61,11 +61,11 @@ struct multipath { struct list_head list; struct dm_target *ti; - spinlock_t lock; - const char *hw_handler_name; char *hw_handler_params; + spinlock_t lock; + unsigned nr_priority_groups; struct list_head priority_groups; @@ -81,16 +81,17 @@ struct multipath { struct priority_group *next_pg; /* Switch to this PG if set */ unsigned repeat_count; /* I/Os left before calling PS again */ - unsigned queue_io; /* Must we queue all I/O? */ - unsigned queue_if_no_path; /* Queue I/O if last path fails? */ - unsigned saved_queue_if_no_path;/* Saved state during suspension */ + unsigned queue_io:1; /* Must we queue all I/O? */ + unsigned queue_if_no_path:1; /* Queue I/O if last path fails? */ + unsigned saved_queue_if_no_path:1; /* Saved state during suspension */ + unsigned pg_init_retries; /* Number of times to retry pg_init */ unsigned pg_init_count; /* Number of times pg_init called */ unsigned pg_init_delay_msecs; /* Number of msecs before pg_init retry */ + unsigned queue_size; struct work_struct process_queued_ios; struct list_head queued_ios; - unsigned queue_size; struct work_struct trigger_event; |