From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 6 Dec 2005 03:52:25 +0000 (-0500)
Subject: [PATCH] spufs: Improved SPU preemptability.
X-Git-Tag: v2.6.16-rc1~666^2~67
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5110459f181ef1f11200bb3dec61953f08cc49e7;p=pandora-kernel.git

[PATCH] spufs: Improved SPU preemptability.

This patch makes it easier to preempt an SPU context by
having the scheduler hold ctx->state_sema for much shorter
periods of time.

As part of this restructuring, the control logic for the "run"
operation is moved from arch/ppc64/kernel/spu_base.c to
fs/spufs/file.c.  Of course the base retains "bottom half"
handlers for class{0,1} irqs.  The new run loop will re-acquire
an SPU if preempted.

From: Mark Nutter <mnutter@us.ibm.com>
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

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