[lustre-devel] [LSF/MM/BPF TOPIC] [DRAFT] Lustre client upstreaming

[Alexey Lyahkov]

> 20 янв. 2025 г., в 07:38, Day, Timothy <timday at amazon.com> написал(а):
> 
> 
> 
> > On 1/19/25, 3:46 PM, "Oleg Drokin" <green at whamcloud.com <mailto:green at whamcloud.com>> wrote:
>>> On Sat, 2025-01-18 at 21:46 +0000, Day, Timothy wrote:
>>> 
>>> 
>>>> On 1/17/25, 10:17 PM, "Oleg Drokin"
>>>> <green at whamcloud.com <mailto:green at whamcloud.com> <mailto:green at whamcloud.com <mailto:green at whamcloud.com>>> wrote:
>>>>> On Sat, 2025-01-18 at 11:45 +1100, NeilBrown wrote:
>>>>> We need to demonstrate a process for, and commitment to, moving
>>>>> away
>>>>> from the dual-tree model. We need patches to those parts of
>>>>> Lustre
>>>>> that are upstream to land in upstream first (mostly).
>>>> 
>>>> 
>>>> I think this is not very realistic.
>>>> Large chunk (100%?) of users do not run not only the latest kernel
>>>> release, they don't run the latest LTS either.
>>>> 
>>>> 
>>>> When we were in staging last this manifested in random patches
>>>> being
>>>> landed and breaking the client completely and nobody noticing for
>>>> months.
>>>> 
>>>> 
>>>> Of course some automatic infrastructure could be built up to make
>>>> it
>>>> somewhat better, but it does not remove the problem of "nobody
>>>> would
>>>> run this mainline tree", I am afraid.
>>> 
>>> I think there's a decent chunk of users on newer kernels. Ubuntu
>>> 22/24 is
>>> on (a bit past latest) LTS 6.8 kernel [1], AL2023 is on previous LTS
>>> 6.1 [2], and
>>> working on upcoming LTS 6.12 [3].
>> 
>> 
>> Well, I mostly mean in context of Lustre client use and sure there's
>> some 6.8 LTS in use on those ubuntu clients, though I cannot assess the
>> real numbers, majority of reports I see are still on 5.x even on
>> Ubuntu.
> 
> Yeah, I'm not sure of the real numbers. It's just my personal experience
> that newer kernels are getting a lot of traction.


https://www.eofs.eu/wp-content/uploads/2024/02/1.1-community_release_update.pdf

https://wiki.opensfs.org/images/1/1d/OpenSFS_Survey_Results_March_2024.pdf

And similar presentations from LAD/LUG.


Alex