From patchwork Wed Dec 10 19:03:12 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: (no subject) Date: Wed, 10 Dec 2008 09:03:12 -0000 From: Andre Detsch X-Patchwork-Id: 13286 Message-Id: <200812101903.mBAJ3CPi021862@d24av02.br.ibm.com> To: cbe-oss-dev@ozlabs.org >From 8b8f035270a13b6802ed1196eecf980b07c1e3ae Mon Sep 17 00:00:00 2001 In-Reply-To: <200812101654.05091.adetsch@br.ibm.com> References: <200812101654.05091.adetsch@br.ibm.com> From: Andre Detsch Date: Wed, 10 Dec 2008 16:03:12 -0300 Subject: [PATCH 07/18] powerpc/spufs: Allow gang to grow in size after it has been started MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200812101703.13053.adetsch@br.ibm.com> Just deactivate it, add the new context, and let the calling thread drives its reactivation. It needs to be unscheduled, since it may no longer fit or it may need to be migrated to a different node. Signed-off-by: Luke Browning Signed-off-by: Andre Detsch --- arch/powerpc/platforms/cell/spufs/context.c | 11 +++++++++++ 1 files changed, 11 insertions(+), 0 deletions(-) kref_init(&ctx->kref); diff --git a/arch/powerpc/platforms/cell/spufs/context.c b/arch/powerpc/platforms/cell/spufs/context.c index b810050..d3887fe 100644 --- a/arch/powerpc/platforms/cell/spufs/context.c +++ b/arch/powerpc/platforms/cell/spufs/context.c @@ -57,6 +57,17 @@ struct spu_context *alloc_spu_context(struct spu_gang *gang) if (spu_init_csa(&ctx->csa)) goto out_free_gang; + /* If the gang is running, it needs to be stopped, since we have a + * new context that needs to be gang scheduled. Gangs are allowed + * to grow and shrink over time, but they are unscheduled when it + * happens as the gang may need to migrated to a different node. + */ + if (atomic_read(&gang->nstarted)) { + mutex_lock(&gang->mutex); + spu_deactivate(gang); + mutex_unlock(&gang->mutex); + } + spin_lock_init(&ctx->mmio_lock); mutex_init(&ctx->mapping_lock);