Messages in this thread | | | From | Ganapatrao Kulkarni <> | Date | Fri, 21 Jul 2017 17:12:50 +0530 | Subject | Re: [PATCH] irqchip/gic-v3-its: Allow GIC ITS number more than MAX_NUMNODES |
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Hi Hanjun,
On Fri, Jul 21, 2017 at 4:50 PM, Marc Zyngier <marc.zyngier@arm.com> wrote: > On 21/07/17 11:06, Hanjun Guo wrote: >> On 2017/7/21 17:51, Hanjun Guo wrote: >>> From: Hanjun Guo <hanjun.guo@linaro.org> >>> >>> 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.
Used static array to keep it simple. we can have either dynamic array or increase static array size (which is in init data) to a larger number. We may have to go for dynamic array to be more sane. You can refer my v2 patch [1], which was doing dynamic allocation and avoids 2 calls to acpi parser as done in this patch.
[1] https://patchwork.kernel.org/patch/9798659/
> > I'm not seeing this on the D05 I have access to. Actually, I'm not > seeing any data related to SRAT and the ITS. Is that a different firmware? > >>> >>> 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@linaro.org> >>> Cc: Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com> >>> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> >>> Cc: Marc Zyngier <marc.zyngier@arm.com> >>> --- >>> 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. > > Please post a patch that has all of the fixes, and I'll review that. > > Thanks, > > M. > -- > Jazz is not dead. It just smells funny... > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
thanks Ganapat
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