tree 73356ce50b3fb5055b4a6f39f237f046615f797d
parent 3b3d22cb84a0bb12f6bbb2b1158972894bec3f21
author Arnd Bergmann <arnd@arndb.de> 1133841145 -0500
committer Paul Mackerras <paulus@samba.org> 1136778775 +1100

[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>