git: kernel - Fix CAM tag reservation for AHCI and SILI driver

[Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxxxxx>]

commit 949597c267ec978bb2fa1eacb3297568faef6086
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date:   Sat Apr 9 19:56:24 2011 -0700

    kernel - Fix CAM tag reservation for AHCI and SILI driver
    
    * These drivers were adjusting the number of available tags upward
      using the wrong CAM call, which resulted in CAM not actually queueing
      multiple tags.  Use the correct call.
    
    * With the issue fix and verified up to a combined 31 read and write
      requests can now be queued in parallel to a SATA drive via the AHCI
      driver.  It does appear to make a difference.

Summary of changes:
 sys/dev/disk/ahci/ahci_cam.c |   12 +++++++++---
 sys/dev/disk/sili/sili_cam.c |   12 +++++++++---
 2 files changed, 18 insertions(+), 6 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/949597c267ec978bb2fa1eacb3297568faef6086


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