From patchwork Wed Dec 10 19:03:12 2008 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Detsch X-Patchwork-Id: 13286 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id 2859C474C1 for ; Thu, 11 Dec 2008 06:09:17 +1100 (EST) X-Original-To: cbe-oss-dev@ozlabs.org Delivered-To: cbe-oss-dev@ozlabs.org Received: from igw3.br.ibm.com (igw3.br.ibm.com [32.104.18.26]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "igw3.br.ibm.com", Issuer "Equifax" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 0EB3C474F2 for ; Thu, 11 Dec 2008 06:03:20 +1100 (EST) Received: from d24relay01.br.ibm.com (unknown [9.8.31.16]) by igw3.br.ibm.com (Postfix) with ESMTP id 408CD390308 for ; Wed, 10 Dec 2008 16:59:45 -0200 (BRDT) Received: from d24av02.br.ibm.com (d24av02.br.ibm.com [9.18.232.47]) by d24relay01.br.ibm.com (8.13.8/8.13.8/NCO v9.1) with ESMTP id mBAK2mLc2949220 for ; Wed, 10 Dec 2008 17:02:48 -0300 Received: from d24av02.br.ibm.com (loopback [127.0.0.1]) by d24av02.br.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id mBAJ3Ejl021891 for ; Wed, 10 Dec 2008 17:03:14 -0200 Received: from [9.8.13.23] ([9.8.13.23]) by d24av02.br.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id mBAJ3CPi021862 for ; Wed, 10 Dec 2008 17:03:13 -0200 Date: Wed, 10 Dec 2008 17:03:12 -0200 From: adetsch@br.ibm.com Message-Id: <200812101903.mBAJ3CPi021862@d24av02.br.ibm.com> To: cbe-oss-dev@ozlabs.org Subject: [Cbe-oss-dev] (no subject) X-BeenThere: cbe-oss-dev@ozlabs.org X-Mailman-Version: 2.1.11 Precedence: list List-Id: Discussion about Open Source Software for the Cell Broadband Engine List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: cbe-oss-dev-bounces+patchwork-incoming=ozlabs.org@ozlabs.org Errors-To: cbe-oss-dev-bounces+patchwork-incoming=ozlabs.org@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);