Re: [PATCH net-next v2 09/13] net: mana: share the EQ pool across a queue-set swap

[Jakub Kicinski]

On Wed, 12 Aug 2026 22:04:14 -0700 Long Li wrote:
> Raising the channel count fails with -ENOSPC once the queue-set swap is
> in use:
> 
>   # ethtool -L ens1 combined 32
>   netlink error: No space left on device
>   mana 7870:00:00.0: No free MSI vectors available
> 
> Building a second set of EQs while the running set still held its own
> meant peak demand of old + new MSI-X vectors. With 32 usable vectors and
> a driver that comes up at 16 queues, 16 -> 17 already needs 33, so the
> advertised maximum is unreachable.
> 
> Make the EQ pool belong to the port rather than to a queue set, so both
> sets share it and peak usage is max(old, new) rather than the sum. The
> pool only ever grows, up to the maximum channel count ethtool reports,
> and is released on detach as before.

Warning: drivers/net/ethernet/microsoft/mana/mana_en.c:1909 No description found for return value of 'mana_grow_eqs'