Hi Jan,
> -Original Message-
> On 23.05.2023 09:32, Henry Wang wrote:
> > By looking into the existing implementation of NUMA for DT,
> > in Linux, from drivers/base/arch_numa.c: numa_set_distance(), there is a
> > "if ((u8)distance != distance)" then return. So I think at least in Linux
On 23.05.2023 09:32, Henry Wang wrote:
>> -Original Message-
>> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
>> tree NUMA distance map
>>
>>>>>> The [2] link you provided discusses NUMA_LOCAL_DISTANCE.
>>>>
Hi Jan,
> -Original Message-
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> >>>> The [2] link you provided discusses NUMA_LOCAL_DISTANCE.
> >>>
> >>> I inferred the discussi
On 23.05.2023 08:31, Henry Wang wrote:
>> -Original Message-
>> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
>> tree NUMA distance map
>>
>>>>>>> +/* The default value in node_distance_map is
>&g
Hi Jan,
> -Original Message-
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> >>>>> +/* The default value in node_distance_map is
> >> NUMA_NO_DISTANCE
> >>>>
Hi Jan
> -Original Message-
> From: Henry Wang
> Subject: RE: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> Hi Jan,
>
> > -Original Message-
> > From: Jan Beulich
> > Subject: Re: [PATCH v4 09/1
Hi Jan,
> -Original Message-
> From: Jan Beulich
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> > Great points! Thanks for pointing the 8-bit truncation out. You are correct.
> > Somehow my impressi
On 26.04.2023 09:36, Henry Wang wrote:
>> -Original Message-
>> From: Jan Beulich
>>
>> On 26.04.2023 08:29, Henry Wang wrote:
-Original Message-
From: Jan Beulich
> +distance = dt_next_cell(1, &matrix);
Upon second thought I checked what dt_ne
Hi Jan,
> -Original Message-
> From: Jan Beulich
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> On 26.04.2023 08:29, Henry Wang wrote:
> >> -Original Message-
> >> From: Jan B
On 26.04.2023 09:08, Henry Wang wrote:
> Hi Jan,
>
>> -Original Message-
>> From: Jan Beulich
>> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
>> tree NUMA distance map
>>
>> On 26.04.2023 07:33, Henry Wang wrote:
>
Hi Jan,
> -Original Message-
> From: Jan Beulich
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> On 26.04.2023 07:33, Henry Wang wrote:
> >> -Original Message-
> >> From: Jan Beulich
On 26.04.2023 08:29, Henry Wang wrote:
>> -Original Message-
>> From: Jan Beulich
>>
>>> +distance = dt_next_cell(1, &matrix);
>>
>> Upon second thought I checked what dt_next_cell() returns: You're silently
>> truncating here and then ...
>>
>>> +/* Bi-directions are n
On 26.04.2023 07:33, Henry Wang wrote:
>> -Original Message-
>> From: Jan Beulich
>>
>>> +/* Get opposite way distance */
>>> +opposite = __node_distance(to, from);
>>> +/* The default value in node_distance_map is NUMA_NO_DISTANCE
>> */
>>> +if ( opposite =
Hi Jan,
> -Original Message-
> From: Jan Beulich
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> > +distance = dt_next_cell(1, &matrix);
>
> Upon second thought I checked what dt_next_
Hi Jan,
> -Original Message-
> From: Jan Beulich
> Subject: Re: [PATCH v4 09/17] xen/arm: introduce a helper to parse device
> tree NUMA distance map
>
> > +unsigned int from, to, distance, opposite;
>
> With these ...
>
> > +
On 25.04.2023 09:56, Henry Wang wrote:
> --- a/xen/arch/arm/numa_device_tree.c
> +++ b/xen/arch/arm/numa_device_tree.c
> @@ -151,3 +151,111 @@ invalid_data:
> numa_fw_bad();
> return -EINVAL;
> }
> +
> +/* Parse NUMA distance map v1 */
> +static int __init fdt_parse_numa_distance_map_v1(
On 25.04.2023 09:56, Henry Wang wrote:
> From: Wei Chen
>
> A NUMA aware device tree will provide a "distance-map" node to
> describe distance between any two nodes. This patch introduce a
> new helper to parse this distance map.
>
> Signed-off-by: Wei Chen
> Signed-off-by: Henry Wang
While t
From: Wei Chen
A NUMA aware device tree will provide a "distance-map" node to
describe distance between any two nodes. This patch introduce a
new helper to parse this distance map.
Signed-off-by: Wei Chen
Signed-off-by: Henry Wang
---
v3 -> v4:
1. The distance map default value is now NUMA_NO_
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