linux-kernel - Re: [PATCH v11 3/3] vhost: Add configuration controls for vhost worker's mode

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Message-ID: <CACGkMEtB_8PRt1Ag0mXV7ycTv1KG_c2PT283hnYukRJrG6h2YQ@mail.gmail.com>
Date: Thu, 12 Jun 2025 14:13:19 +0800
From: Jason Wang <jasowang@...hat.com>
To: Cindy Lu <lulu@...hat.com>
Cc: mst@...hat.com, michael.christie@...cle.com, sgarzare@...hat.com, 
	linux-kernel@...r.kernel.org, virtualization@...ts.linux-foundation.org, 
	netdev@...r.kernel.org
Subject: Re: [PATCH v11 3/3] vhost: Add configuration controls for vhost
 worker's mode

On Mon, Jun 9, 2025 at 3:34 PM Cindy Lu <lulu@...hat.com> wrote:
>
> This patch introduces functionality to control the vhost worker mode:
>
> - Add two new IOCTLs:
>   * VHOST_SET_FORK_FROM_OWNER: Allows userspace to select between
>     task mode (fork_owner=1) and kthread mode (fork_owner=0)
>   * VHOST_GET_FORK_FROM_OWNER: Retrieves the current thread mode
>     setting
>
> - Expose module parameter 'fork_from_owner_default' to allow system
>   administrators to configure the default mode for vhost workers
>
> - Add KConfig option CONFIG_VHOST_ENABLE_FORK_OWNER_CONTROL to
>   control the availability of these IOCTLs and parameter, allowing
>   distributions to disable them if not needed
>
> - The VHOST_NEW_WORKER functionality requires fork_owner to be set
>   to true, with validation added to ensure proper configuration
>
> Signed-off-by: Cindy Lu <lulu@...hat.com>

Acked-by: Jason Wang <jasowang@...hat.com>

Thanks