diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2016-12-03 09:50:21 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-07 07:23:25 +0100 |
| commit | 8c9105802235c28b03359d779cbd0557b7b66e70 (patch) | |
| tree | f713b6e57cf9f2dc6af152e17a654b787eb167e7 /arch/s390/numa/mode_emu.c | |
| parent | 30fc4ca2a8ab508d160a917b89b7e1c27f893354 (diff) | |
s390/numa: establish cpu to node mapping early
Initialize the cpu topology and therefore also the cpu to node mapping
much earlier. Fixes this warning and subsequent crashes when using the
fake numa emulation mode on s390:
WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:121 select_task_rq+0xe6/0x1a8
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.6.0-rc6-00001-ge9d867a67fd0-dirty #28
task: 00000001dd270008 ti: 00000001eccb4000 task.ti: 00000001eccb4000
Krnl PSW : 0404c00180000000 0000000000176c56 (select_task_rq+0xe6/0x1a8)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3
Call Trace:
([<0000000000176c30>] select_task_rq+0xc0/0x1a8)
([<0000000000177d64>] try_to_wake_up+0x2e4/0x478)
([<000000000015d46c>] create_worker+0x174/0x1c0)
([<0000000000161a98>] alloc_unbound_pwq+0x360/0x438)
([<0000000000162550>] apply_wqattrs_prepare+0x200/0x2a0)
([<000000000016266a>] apply_workqueue_attrs_locked+0x7a/0xb0)
([<0000000000162af0>] apply_workqueue_attrs+0x50/0x78)
([<000000000016441c>] __alloc_workqueue_key+0x304/0x520)
([<0000000000ee3706>] default_bdi_init+0x3e/0x70)
([<0000000000100270>] do_one_initcall+0x140/0x1d8)
([<0000000000ec9da8>] kernel_init_freeable+0x220/0x2d8)
([<0000000000984a7a>] kernel_init+0x2a/0x150)
([<00000000009913fa>] kernel_thread_starter+0x6/0xc)
([<00000000009913f4>] kernel_thread_starter+0x0/0xc)
Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/numa/mode_emu.c')
| -rw-r--r-- | arch/s390/numa/mode_emu.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/s390/numa/mode_emu.c b/arch/s390/numa/mode_emu.c index 2ed27e8eb4d4..02b840d8f9af 100644 --- a/arch/s390/numa/mode_emu.c +++ b/arch/s390/numa/mode_emu.c @@ -21,6 +21,7 @@ #include <linux/kernel.h> #include <linux/cpumask.h> #include <linux/memblock.h> +#include <linux/bootmem.h> #include <linux/node.h> #include <linux/memory.h> #include <linux/slab.h> @@ -307,13 +308,11 @@ fail: /* * Allocate and initialize core to node mapping */ -static void create_core_to_node_map(void) +static void __ref create_core_to_node_map(void) { int i; - emu_cores = kzalloc(sizeof(*emu_cores), GFP_KERNEL); - if (emu_cores == NULL) - panic("Could not allocate cores to node memory"); + emu_cores = memblock_virt_alloc(sizeof(*emu_cores), 8); for (i = 0; i < ARRAY_SIZE(emu_cores->to_node_id); i++) emu_cores->to_node_id[i] = NODE_ID_FREE; } @@ -354,7 +353,7 @@ static struct toptree *toptree_from_topology(void) phys = toptree_new(TOPTREE_ID_PHYS, 1); - for_each_online_cpu(cpu) { + for_each_cpu(cpu, &cpus_with_topology) { top = &cpu_topology[cpu]; node = toptree_get_child(phys, 0); drawer = toptree_get_child(node, top->drawer_id); |