lkml.org 
[lkml]   [2014]   [Jul]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RFC Patch V1 17/30] mm, intel_powerclamp: Use cpu_to_mem()/numa_mem_id() to support memoryless node
Date
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 <jiang.liu@linux.intel.com>
---
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


\
 
 \ /
  Last update: 2014-07-11 10:41    [W:0.339 / U:0.772 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site