From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiang Liu Subject: [RFC Patch V1 17/30] mm, intel_powerclamp: Use cpu_to_mem()/numa_mem_id() to support memoryless node Date: Fri, 11 Jul 2014 15:37:34 +0800 Message-ID: <1405064267-11678-18-git-send-email-jiang.liu@linux.intel.com> References: <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com> Return-path: In-Reply-To: <1405064267-11678-1-git-send-email-jiang.liu@linux.intel.com> Sender: owner-linux-mm@kvack.org To: Andrew Morton , Mel Gorman , David Rientjes , Mike Galbraith , Peter Zijlstra , "Rafael J . Wysocki" , Zhang Rui , Eduardo Valentin Cc: Jiang Liu , Tony Luck , linux-mm@kvack.org, linux-hotplug@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org List-Id: linux-pm@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/thermal/intel_powerclamp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/intel_powerclamp.c b/drivers/thermal/intel_powerclamp.c index 95cb7fc20e17..9d9be8cd1b50 100644 --- a/drivers/thermal/intel_powerclamp.c +++ b/drivers/thermal/intel_powerclamp.c @@ -531,7 +531,7 @@ static int start_power_clamp(void) thread = kthread_create_on_node(clamp_thread, (void *) cpu, - cpu_to_node(cpu), + cpu_to_mem(cpu), "kidle_inject/%ld", cpu); /* bind to cpu here */ if (likely(!IS_ERR(thread))) { @@ -582,7 +582,7 @@ static int powerclamp_cpu_callback(struct notifier_block *nfb, case CPU_ONLINE: thread = kthread_create_on_node(clamp_thread, (void *) cpu, - cpu_to_node(cpu), + cpu_to_mem(cpu), "kidle_inject/%lu", cpu); if (likely(!IS_ERR(thread))) { kthread_bind(thread, cpu); -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org