From: Linas Vepstas <linas@austin.ibm.com>
Date: Tue, 10 Oct 2006 21:14:29 +0000 (-0500)
Subject: [PATCH] powerpc/cell spidernet refine locking
X-Git-Tag: v2.6.19-rc2~23^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9cc7bf7edf50a8a6b456b337aff97fe780ae369b;p=pandora-kernel.git

[PATCH] powerpc/cell spidernet refine locking

The transmit side of the spider ethernet driver currently
places locks around some very large chunks of code. This
results in a fair amount of lock contention is some cases.
This patch makes the locks much more fine-grained, protecting
only the cirtical sections. One lock is used to protect
three locations: the queue head and tail pointers, and the
queue low-watermark location.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: James K Lewis <jklewis@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

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