Messages in this thread Patch in this message | | | Date | Wed, 10 Jun 2020 10:45:53 +0200 | From | Heiko Carstens <> | Subject | Re: [PATCH] s390: set NODES_SHIFT=0 when NUMA=n |
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On Tue, Jun 09, 2020 at 09:45:01PM -0400, Qian Cai wrote: > When NUMA=n and nr_node_ids=2, in apply_wqattrs_prepare(), it has, > > for_each_node(node) { > if (wq_calc_node_cpumask(... > > where it will trigger a booting warning, > > WARNING: workqueue cpumask: online intersect > possible intersect > > because it found 2 nodes and wq_numa_possible_cpumask[1] is an empty > cpumask. NUMA=y has no such problem because node_possible_map will be > initialized properly containing only node 0. Fix it by setting > NODES_SHIFT=0 when NUMA=n. > > Fixes: 701dc81e7412 ("s390/mm: remove fake numa support") > Signed-off-by: Qian Cai <cai@lca.pw> > --- > arch/s390/Kconfig | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-)
Thanks! However I committed a different solution. Hope you don't mind:
From dd3f1f08f2317768b35b2df3ff8285185df7e195 Mon Sep 17 00:00:00 2001 From: Heiko Carstens <heiko.carstens@de.ibm.com> Date: Wed, 10 Jun 2020 10:36:05 +0200 Subject: [PATCH] s390/numa: let NODES_SHIFT depend on NEED_MULTIPLE_NODES
Qian Cai reported: --- When NUMA=n and nr_node_ids=2, in apply_wqattrs_prepare(), it has,
for_each_node(node) { if (wq_calc_node_cpumask(...
where it will trigger a booting warning,
WARNING: workqueue cpumask: online intersect > possible intersect
because it found 2 nodes and wq_numa_possible_cpumask[1] is an empty cpumask. ---
Let NODES_SHIFT depend on NEED_MULTIPLE_NODES like it is done on other architectures in order to fix this.
Fixes: 701dc81e7412 ("s390/mm: remove fake numa support") Reported-by: Qian Cai <cai@lca.pw> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> --- arch/s390/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 2167bce993ff..ae01be202204 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -462,6 +462,7 @@ config NUMA config NODES_SHIFT int + depends on NEED_MULTIPLE_NODES default "1" config SCHED_SMT -- 2.17.1
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