On 2017/7/21 17:51, Hanjun Guo wrote: > From: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > > When running 4.13-rc1 on top of D05, I got the boot log: > > [ 0.000000] SRAT: PXM 0 -> ITS 0 -> Node 0 > [ 0.000000] SRAT: PXM 0 -> ITS 1 -> Node 0 > [ 0.000000] SRAT: PXM 0 -> ITS 2 -> Node 0 > [ 0.000000] SRAT: PXM 1 -> ITS 3 -> Node 1 > [ 0.000000] SRAT: ITS affinity exceeding max count[4] > > This is wrong on D05 as we have 8 ITSes with 4 NUMA nodes. > > So dynamically alloc the memory needed instead of using > its_srat_maps[MAX_NUMNODES], which count the number of > ITS entry(ies) in SRAT and alloc its_srat_maps as needed, > then build the mapping of numa node to ITS ID. > > After doing this, I got what I wanted: > > [ 0.000000] SRAT: PXM 0 -> ITS 0 -> Node 0 > [ 0.000000] SRAT: PXM 0 -> ITS 1 -> Node 0 > [ 0.000000] SRAT: PXM 0 -> ITS 2 -> Node 0 > [ 0.000000] SRAT: PXM 1 -> ITS 3 -> Node 1 > [ 0.000000] SRAT: PXM 2 -> ITS 4 -> Node 2 > [ 0.000000] SRAT: PXM 2 -> ITS 5 -> Node 2 > [ 0.000000] SRAT: PXM 2 -> ITS 6 -> Node 2 > [ 0.000000] SRAT: PXM 3 -> ITS 7 -> Node 3 > > Fixes: dbd2b8267233 ("irqchip/gic-v3-its: Add ACPI NUMA node mapping") > Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> > Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@xxxxxxxxxx> > Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > --- > drivers/irqchip/irq-gic-v3-its.c | 28 +++++++++++++++++++++------- > 1 file changed, 21 insertions(+), 7 deletions(-) > > diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c > index 3ccdf76..fb1c090 100644 > --- a/drivers/irqchip/irq-gic-v3-its.c > +++ b/drivers/irqchip/irq-gic-v3-its.c > @@ -1847,7 +1847,7 @@ struct its_srat_map { > u32 its_id; > }; > > -static struct its_srat_map its_srat_maps[MAX_NUMNODES] __initdata; > +static struct its_srat_map *its_srat_maps __initdata; > static int its_in_srat __initdata; > > static int __init acpi_get_its_numa_node(u32 its_id) > @@ -1861,6 +1861,12 @@ static int __init acpi_get_its_numa_node(u32 its_id) > return NUMA_NO_NODE; > } Oops, need to check if the its_srat_maps valid or not here, please comment on what else I'm missing or wrong, then I will prepare another version. Thanks Hanjun -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html