Hi,
On Wed, 2024-08-07 at 16:49 +0300, Kalle Valo wrote:
> Chris Bainbridge <chris.bainbridge@xxxxxxxxx> writes:
>
> > On Wed, 7 Aug 2024 at 13:10, Kalle Valo <kvalo@xxxxxxxxxx> wrote:
> > > [SNIP]
> > Not really. It is functional but tx throughput is severely
> > degraded,
> > iperf shows ~1mbit/sec instead of the usual ~600mbit. Rx throughput
> > (measured with `iperf -c ... -R`) doesn't seem to be affected.
>
> Ok, so a quite severe issue. Hopefully Intel can find a fix,
> otherwise
> we need to consider should we revert commit 90db50755228 ("wifi:
> iwlwifi: use already mapped data when TXing an AMSDU") for v6.11.
Yes, if we do not have a fix soon we'll need to revert. If so, then we
should also revert:
wifi: iwlwifi: keep the TSO and workaround pages mapped
wifi: iwlwifi: map entire SKB when sending AMSDUs
as well as the related bugfix:
wifi: iwlwifi: correctly reference TSO page information
Otherwise there is a performance impact as DMA mapping is effectively
done twice.
Benjamin
Intel Deutschland GmbH
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