Stack trace output during a stress test:
[ 4.310049] Freeing initrd memory: 22592K
[ 4.310646] rtas_flash: no firmware flash support
[ 4.313341] cpuhp/64: page allocation failure: order:0,
mode:0x14480c0(GFP_KERNEL|__GFP_ZERO|__GFP_THISNODE), nodemask=(null)
[ 4.313465] cpuhp/64 cpuset=/ mems_allowed=0
[ 4.313521] CPU: 64 PID: 392 Comm: cpuhp/64 Not tainted
4.11.0-39.el7a.ppc64le #1
[ 4.313588] Call Trace:
[ 4.313622] [c000000f1fb1b8e0] [c000000000c09388] dump_stack+0xb0/0xf0
(unreliable)
[ 4.313694] [c000000f1fb1b920] [c00000000030ef6c] warn_alloc+0x12c/0x1c0
[ 4.313753] [c000000f1fb1b9c0] [c00000000030ff68]
__alloc_pages_nodemask+0xea8/0x1000
[ 4.313823] [c000000f1fb1bbb0] [c000000000113a8c]
core_imc_mem_init+0xbc/0x1c0
[ 4.313892] [c000000f1fb1bc00] [c000000000113cdc]
ppc_core_imc_cpu_online+0x14c/0x170
[ 4.313962] [c000000f1fb1bc90] [c000000000125758]
cpuhp_invoke_callback+0x198/0x5d0
[ 4.314031] [c000000f1fb1bd00] [c00000000012782c] cpuhp_thread_fun+0x8c/0x3d0
[ 4.314101] [c000000f1fb1bd60] [c0000000001678d0]
smpboot_thread_fn+0x290/0x2a0
[ 4.314169] [c000000f1fb1bdc0] [c00000000015ee78] kthread+0x168/0x1b0
[ 4.314229] [c000000f1fb1be30] [c00000000000b368]
ret_from_kernel_thread+0x5c/0x74
[ 4.314313] Mem-Info:
[ 4.314356] active_anon:0 inactive_anon:0 isolated_anon:0
core_imc_mem_init() at system boot use alloc_pages_node() to get memory
and alloc_pages_node() throws this stack dump when tried to allocate
memory from a node which has no memory behind it. Add a ___GFP_NOWARN
flag in allocation request as a fix.
Signed-off-by: Anju T Sudhakar <a...@linux.vnet.ibm.com>
Reported-by: Michael Ellerman <m...@ellerman.id.au>
Reported-by: Venkat R.B <venka...@in.ibm.com>
---
arch/powerpc/perf/imc-pmu.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index 9ccac86f3463..d99ea01a2028 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -523,8 +523,8 @@ static int core_imc_mem_init(int cpu, int size)
/* We need only vbase for core counters */
mem_info->vbase = page_address(alloc_pages_node(phys_id,
- GFP_KERNEL | __GFP_ZERO |
__GFP_THISNODE,
- get_order(size)));
+ GFP_KERNEL | __GFP_ZERO |
__GFP_THISNODE |
+ __GFP_NOWARN, get_order(size)));
if (!mem_info->vbase)
return -ENOMEM;
@@ -763,8 +763,8 @@ static int thread_imc_mem_alloc(int cpu_id, int size)
* free the memory in cpu offline path.
*/
local_mem = page_address(alloc_pages_node(phys_id,
- GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE,
- get_order(size)));
+ GFP_KERNEL | __GFP_ZERO | __GFP_THISNODE |
+ __GFP_NOWARN, get_order(size)));
if (!local_mem)
return -ENOMEM;
--
2.14.1
