Re: [PATCH 6.12] vsock/virtio: fix zerocopy completion for multi-skb sends

Sasha Levin <[email protected]> Sun, 19 Jul 2026 11:00:15 -0400
Newsgroups dev.linux.lists.virtualization,org.kernel.vger.kvm,org.kernel.vger.linux-kernel,org.kernel.vger.netdev,org.kernel.vger.stable
Message-ID <[email protected]>
> When a large message is fragmented into multiple skbs, the zerocopy
> uarg is only allocated and attached to the last skb in the loop.
> Non-final skbs carry pinned user pages with no completion tracking,
> so the kernel has no way to notify userspace when those pages are safe
> to reuse.

Queued for 6.12, thanks.

-- 
Thanks,
Sasha