Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753003AbaGKHs3 (ORCPT ); Fri, 11 Jul 2014 03:48:29 -0400 Received: from mga09.intel.com ([134.134.136.24]:36972 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752460AbaGKHgL (ORCPT ); Fri, 11 Jul 2014 03:36:11 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,642,1400050800"; d="scan'208";a="571589620" From: Jiang Liu To: Andrew Morton , Mel Gorman , David Rientjes , Mike Galbraith , Peter Zijlstra , "Rafael J . Wysocki" , Mike Marciniszyn , Roland Dreier , Sean Hefty , Hal Rosenstock Cc: Jiang Liu , Tony Luck , linux-mm@kvack.org, linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org Subject: [RFC Patch V1 12/30] mm, IB/qib: Use cpu_to_mem()/numa_mem_id() to support memoryless node Date: Fri, 11 Jul 2014 15:37:29 +0800 Message-Id: <1405064267-11678-13-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com> References: <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When CONFIG_HAVE_MEMORYLESS_NODES is enabled, cpu_to_node()/numa_node_id() may return a node without memory, and later cause system failure/panic when calling kmalloc_node() and friends with returned node id. So use cpu_to_mem()/numa_mem_id() instead to get the nearest node with memory for the/current cpu. If CONFIG_HAVE_MEMORYLESS_NODES is disabled, cpu_to_mem()/numa_mem_id() is the same as cpu_to_node()/numa_node_id(). Signed-off-by: Jiang Liu --- drivers/infiniband/hw/qib/qib_file_ops.c | 4 ++-- drivers/infiniband/hw/qib/qib_init.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/qib/qib_file_ops.c b/drivers/infiniband/hw/qib/qib_file_ops.c index b15e34eeef68..55540295e0e3 100644 --- a/drivers/infiniband/hw/qib/qib_file_ops.c +++ b/drivers/infiniband/hw/qib/qib_file_ops.c @@ -1312,8 +1312,8 @@ static int setup_ctxt(struct qib_pportdata *ppd, int ctxt, assign_ctxt_affinity(fp, dd); numa_id = qib_numa_aware ? ((fd->rec_cpu_num != -1) ? - cpu_to_node(fd->rec_cpu_num) : - numa_node_id()) : dd->assigned_node_id; + cpu_to_mem(fd->rec_cpu_num) : numa_mem_id()) : + dd->assigned_node_id; rcd = qib_create_ctxtdata(ppd, ctxt, numa_id); diff --git a/drivers/infiniband/hw/qib/qib_init.c b/drivers/infiniband/hw/qib/qib_init.c index 8d3c78ddc906..85ff56ad1075 100644 --- a/drivers/infiniband/hw/qib/qib_init.c +++ b/drivers/infiniband/hw/qib/qib_init.c @@ -133,7 +133,7 @@ int qib_create_ctxts(struct qib_devdata *dd) int local_node_id = pcibus_to_node(dd->pcidev->bus); if (local_node_id < 0) - local_node_id = numa_node_id(); + local_node_id = numa_mem_id(); dd->assigned_node_id = local_node_id; /* -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/