diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-07-31 16:14:18 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-05 09:20:10 +0200 |
| commit | d519aab009a132f66eac44f4d6ae32b615e97859 (patch) | |
| tree | b4040765113ee4cbe0a9767ed900db0926236339 /arch | |
| parent | b9f66a2ba6e69f1b13e968af71cc5bd9c5ccb95a (diff) | |
s390/numa: move initial setup of node_to_cpumask_map
commit fb7d7518b0d65955f91c7b875c36eae7694c69bd upstream.
The numa_init_early initcall sets the node_to_cpumask_map[0] to the
full cpu_possible_mask. Unfortunately this early_initcall is too late,
the NUMA setup for numa=emu is done even earlier. The order of calls
is numa_setup() -> emu_update_cpu_topology(), then the early_initcalls(),
followed by sched_init_domains().
Starting with git commit 051f3ca02e46432c0965e8948f00c07d8a2f09c0
"sched/topology: Introduce NUMA identity node sched domain"
the incorrect node_to_cpumask_map[0] really screws up the domain
setup and the kernel panics with the follow oops:
Cc: <stable@vger.kernel.org> # v4.15+
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/numa/numa.c | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c index f576f1073378..0dac2640c3a7 100644 --- a/arch/s390/numa/numa.c +++ b/arch/s390/numa/numa.c @@ -133,6 +133,8 @@ void __init numa_setup(void) { pr_info("NUMA mode: %s\n", mode->name); nodes_clear(node_possible_map); + /* Initially attach all possible CPUs to node 0. */ + cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask); if (mode->setup) mode->setup(); numa_setup_memory(); @@ -140,20 +142,6 @@ void __init numa_setup(void) } /* - * numa_init_early() - Initialization initcall - * - * This runs when only one CPU is online and before the first - * topology update is called for by the scheduler. - */ -static int __init numa_init_early(void) -{ - /* Attach all possible CPUs to node 0 for now. */ - cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask); - return 0; -} -early_initcall(numa_init_early); - -/* * numa_init_late() - Initialization initcall * * Register NUMA nodes. |