[Cbe-oss-dev] [PATCH 10/21] spusched: no preemption for nosched contexts

[Jeremy Kerr]

From: Christoph Hellwig <hch at lst.de>

And last but not least we need to make sure the scheduler tick never
preempts a nosched context.

Signed-off-by: Christoph Hellwig <hch at lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann at de.ibm.com>
Signed-off-by: Jeremy Kerr <jk at ozlabs.org>
---
 arch/powerpc/platforms/cell/spufs/sched.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index a20e4e2..7bb5229 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -522,7 +522,12 @@ void spu_yield(struct spu_context *ctx)
 
 static void spusched_tick(struct spu_context *ctx)
 {
-	if (ctx->policy == SCHED_FIFO || --ctx->time_slice)
+	if (ctx->flags & SPU_CREATE_NOSCHED)
+		return;
+	if (ctx->policy == SCHED_FIFO)
+		return;
+
+	if (--ctx->time_slice)
 		return;
 
 	/*
-- 
1.5.0.rc4.g85b1