From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sun, 12 Aug 2007 10:51:18 +0000 (+0200)
Subject: firewire: fw-sbp2: use an own workqueue (fix system responsiveness)
X-Git-Tag: v2.6.24-rc1~825^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df8ec2490fed5dd23316bbb2c2e90e59e7d37126;p=pandora-kernel.git

firewire: fw-sbp2: use an own workqueue (fix system responsiveness)

Firewire-sbp2 did very uncooperative things in the kernel's shared
workqueue:  Sleeping until reception of management status from the
target for up to 2 seconds, and performing SCSI inquiry and all of the
setup of SCSI command set drivers via scsi_add_device.  If there were
transient or permanent error conditions, this caused long blockage of
the kernel's events process, noticeable e.g. by blocked keyboard input.

We now allocate a workqueue process exclusive to fw-sbp2.  As a side
effect, this also increases parallelism of fw-sbp2's login and reconnect
work versus fw-core's device discovery and device update work which is
performed in the shared workqueue.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
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