mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-28 15:20:41 +00:00
5d2ee7122c
Even if we have no waiters on any of the sbitmap_queue wait states, we still have to loop every entry to check. We do this for every IO, so the cost adds up. Shift a bit of the cost to the slow path, when we actually have waiters. Wrap prepare_to_wait_exclusive() and finish_wait(), so we can maintain an internal count of how many are currently active. Then we can simply check this count in sbq_wake_ptr() and not have to loop if we don't have any sleepers. Convert the two users of sbitmap with waiting, blk-mq-tag and iSCSI. Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
---|---|---|
.. | ||
cxgbit | ||
iscsi_target.c | ||
iscsi_target.h | ||
iscsi_target_auth.c | ||
iscsi_target_auth.h | ||
iscsi_target_configfs.c | ||
iscsi_target_datain_values.c | ||
iscsi_target_datain_values.h | ||
iscsi_target_device.c | ||
iscsi_target_device.h | ||
iscsi_target_erl0.c | ||
iscsi_target_erl0.h | ||
iscsi_target_erl1.c | ||
iscsi_target_erl1.h | ||
iscsi_target_erl2.c | ||
iscsi_target_erl2.h | ||
iscsi_target_login.c | ||
iscsi_target_login.h | ||
iscsi_target_nego.c | ||
iscsi_target_nego.h | ||
iscsi_target_nodeattrib.c | ||
iscsi_target_nodeattrib.h | ||
iscsi_target_parameters.c | ||
iscsi_target_parameters.h | ||
iscsi_target_seq_pdu_list.c | ||
iscsi_target_seq_pdu_list.h | ||
iscsi_target_stat.c | ||
iscsi_target_tmr.c | ||
iscsi_target_tmr.h | ||
iscsi_target_tpg.c | ||
iscsi_target_tpg.h | ||
iscsi_target_transport.c | ||
iscsi_target_util.c | ||
iscsi_target_util.h | ||
Kconfig | ||
Makefile |