linux

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History

Chris Leech c1ecb90a66 [SCSI] libfc: reduce hold time on SCSI host lock

Introduce a new lock to protect the list of fc_fcp_pkt structs in libfc
instead of using the host lock.  This reduces the contention of this heavily
used lock, and I see up to a 25% performance gain in CPU bound small I/O
tests when scaling out across multiple quad-core CPUs.

The big win is in removing the host lock from the completion path
completely, as it does not need to be held around the call to scsi_done.

Signed-off-by: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

2009-12-12 16:30:33 -06:00

fc_disc.c

[SCSI] libfc fcoe: increase ELS and CT timeouts

2009-12-04 12:01:27 -06:00

fc_elsct.c

[SCSI] libfc: fix fc_els_resp_type to correct display of CT responses

2009-12-04 12:01:17 -06:00

fc_exch.c

[SCSI] libfc: fix an issue of pending exch/es after i/f destroyed or rmmod fcoe

2009-12-04 12:01:26 -06:00

fc_fcp.c

[SCSI] libfc: reduce hold time on SCSI host lock