Chris Bainbridge <chris.bainbridge@xxxxxxxxx> writes:
> On Wed, 7 Aug 2024 at 13:10, Kalle Valo <kvalo@xxxxxxxxxx> wrote:
>>
>> Chris Bainbridge <chris.bainbridge@xxxxxxxxx> writes:
>>
>> > I hit the following bug in 6.11.0-rc2. Reverting the offending commit
>> > fixes the issue. This happens immediately when I run `iperf3 -bidir`.
>>
>> [...]
>>
>> > [ 42.873868] ------------[ cut here ]------------
>> > [ 42.873989] WARNING: CPU: 1 PID: 529 at
>> > drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1836
>> > iwl_pcie_get_sgt_tb_phys
>> > (drivers/net/wireless/intel/iwlwifi/pcie/tx.c:1836) iwlwifi
>>
>> Does the connection still work after the warning?
>
> 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.
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