Re: [PATCH docs v2 7/11] virtiofs: add thread-pool-size description

["Daniel Kral" <d.kral@proxmox.com>]

On Mon Feb 23, 2026 at 4:40 PM CET, Markus Frank wrote:
> Signed-off-by: Markus Frank <m.frank@proxmox.com>
> ---
>  qm.adoc | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/qm.adoc b/qm.adoc
> index 46217a6..09fbd20 100644
> --- a/qm.adoc
> +++ b/qm.adoc
> @@ -1342,12 +1342,13 @@ All Optional Parameters:
>  |`expose-acl` |Enables ACL passthrough; implies `expose-xattr`. Supported only on compatible filesystems. |`0`
>  |`expose-xattr` |Enables xattr passthrough; redundant if `expose-acl` is `1`. |`0`
>  |`direct-io` |Enables support for the `O_DIRECT` flag. May degrade performance, but is useful if applications perform their own caching. |`0`
> +|`thread-pool-size` |Controls the maximum number of worker threads used by virtiofsd to handle requests. Adjust for performance tuning. `0` disables the thread pool. |`0`
>  |===

`readonly` should be added here in another patch as well... but we could
also make this a little more future proof if we generate these while
building with a `gen-optional-virtiofsd-opts.pl` script.

>  
>  ----
>  qm set <vmid> -virtiofs0 dirid=<dirid>,cache=always,direct-io=1
>  qm set <vmid> -virtiofs1 <dirid>,cache=never,expose-xattr=1
> -qm set <vmid> -virtiofs2 <dirid>,expose-acl=1
> +qm set <vmid> -virtiofs2 <dirid>,expose-acl=1,thread-pool-size=16
>  ----
>  
>  To temporarily mount virtiofs in a guest VM with the Linux kernel virtiofs