[PATCH v2] nvmet: make nvmet_wq visible in sysfs

[Guixin Liu]

在 2024/10/31 14:23, Chaitanya Kulkarni 写道:
> On 10/30/24 19:27, Guixin Liu wrote:
>> In some complex scenarios, we deploy multiple tasks on a single machine
>> (hybrid deployment), such as:
>>     1. Docker containers for function computation (background processing).
>>     2. Docker containers for real-time tasks.
>>     3. Docker containers for monitoring, event handling, and management.
>>     4. An NVMe target server.
>> Each of these components is restricted to its own CPU cores to prevent
>> mutual interference and ensure strict isolation. Additionally, we make
>> the nvmet_wq visible in sysfs, allowing for tuning its attributes
>> through sysfs, such as cpumask.
>
> How about following ? no need to send V3 can be done at
> the time of applying the patch if you are okay with it :-
>
> " In  some complex scenarios, we deploy multiple taskson  asingle  machine
> (hybrid deployment), suchas  Docker containersfor  function  computation
> (background processing), real-time tasks, monitoring,event  handling,
> and  management, alongwith  an NVMe target server.
>
> Each  of  these componentsis  restrictedto  its own CPU coresto  prevent
> mutual interferenceand  ensurestrict  isolation.To  achieve this level
> of  isolation for nvmet_wq we needto  use sysfs tunables such as
> cpumask that are currently not accessible.
>
> Add WQ_SYSFS flag to alloc_workqueue() when creating nvmet_wq so
> workqueue tunables are exported in the userspace via sysfs.
>
> with this patch :-
>
> nvme (nvme-6.13) # ls /sys/devices/virtual/workqueue/nvmet-wq/
> affinity_scope  affinity_strict  cpumask  max_active  nice  per_cpu
> power  subsystem  uevent
>
> "
>
> With that looks good.
>
> Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>
>
> -ck
>
Thanks for tunning the commit message, the new content looks good,

but I see some words are joined together, "coresto" -> "cores to",

"interferenceand" -> "interference and", and so on.

Please change this when you applying the patch.

Best Regards,

Guixin Liu