From 2442a8ba5abe2c27c572bc522da1c33df98c6ec7 Mon Sep 17 00:00:00 2001
From: Luke Browning <lukebrowning@us.ibm.com>
Date: Fri, 6 Jun 2008 11:26:54 +0800
Subject: [PATCH] powerpc/spufs: don't extend time time slice if context is not
in spu_run
An spu context shouldn't get an extra tick if the time slice code
couldn't find something else to run. This means contexts that are not
within spu_run (ie, SPU_SCHED_SPU_RUN is cleared) will not receive
extra ticks while we have no other contexts waiting.
Signed-off-by: Luke Browning <lukebrowning@us.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
---
arch/powerpc/platforms/cell/spufs/sched.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index e929e70a84e3..afb92d4fbcf5 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -899,7 +899,8 @@ static noinline void spusched_tick(struct spu_context *ctx)
spu_add_to_rq(ctx);
} else {
spu_context_nospu_trace(spusched_tick__newslice, ctx);
- ctx->time_slice++;
+ if (!ctx->time_slice)
+ ctx->time_slice++;
}
out:
spu_release(ctx);
--
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