[Cbe-oss-dev] [PATCH 2/6] spufs: fix timing dependent false return from spufs_run_spu

[Christoph Hellwig]

On Wed, Feb 06, 2008 at 03:43:29PM -0200, Luke Browning wrote:
> Eliminate timing dependent false return from spufs_run_spu().
> 
> Stop bits are only valid when the running bit is not set.  Status bits carry 
> over from one invocation of spufs_run_spu() to another, so the RUNNING bit 
> gets added to the previous state of the register which may have been a remote
> library call.  In this case, it looks like another library routine should be
> invoked, but the spe is actually running.  This solves a problem with a 
> testcase that exercises the scheduler.

This looks like a fix for sched_simple indeed.  I can't get at my blade
currently, but I'll test it later today.