From: "Toke Høiland-Jørgensen" <toke@redhat.com>
To: Johannes Berg <johannes@sipsolutions.net>,
Jens Axboe <axboe@kernel.dk>,
Emmanuel Grumbach <emmanuel.grumbach@intel.com>,
Luca Coelho <luciano.coelho@intel.com>
Cc: "linux-wireless\@vger.kernel.org"
<linux-wireless@vger.kernel.org>,
Networking <netdev@vger.kernel.org>
Subject: Re: iwlwifi warnings in 5.5-rc1
Date: Wed, 11 Dec 2019 15:04:59 +0100 [thread overview]
Message-ID: <87r21bez5g.fsf@toke.dk> (raw)
In-Reply-To: <14bbfcc8408500704c46701251546e7ff65c6fd0.camel@sipsolutions.net>
Johannes Berg <johannes@sipsolutions.net> writes:
> Btw, there's *another* issue. You said in the commit log:
>
> This patch does *not* include any mechanism to wake a throttled TXQ again,
> on the assumption that this will happen anyway as a side effect of whatever
> freed the skb (most commonly a TX completion).
>
> Thinking about this some more, I'm not convinced that this assumption
> holds. You could have been stopped due to the global limit, and now you
> wake some queue but the TXQ is empty - now you should reschedule some
> *other* TXQ since the global limit had kicked in, not the per-TXQ limit,
> and prevented dequeuing, no?
Well if you hit the global limit that means you have 24ms worth of data
queued in the hardware; those should be completed in turn, and enable
more to be dequeued, no?
-Toke
next prev parent reply other threads:[~2019-12-11 14:05 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 20:46 iwlwifi warnings in 5.5-rc1 Jens Axboe
2019-12-11 8:36 ` Johannes Berg
2019-12-11 8:53 ` Toke Høiland-Jørgensen
2019-12-11 10:11 ` Johannes Berg
2019-12-11 10:23 ` Toke Høiland-Jørgensen
2019-12-11 11:51 ` Johannes Berg
2019-12-11 13:42 ` Johannes Berg
2019-12-11 14:04 ` Toke Høiland-Jørgensen [this message]
2019-12-11 14:12 ` Johannes Berg
2019-12-11 14:47 ` Toke Høiland-Jørgensen
2019-12-11 21:18 ` Johannes Berg
2019-12-12 10:45 ` Toke Høiland-Jørgensen
2019-12-11 14:02 ` Toke Høiland-Jørgensen
2019-12-11 21:17 ` Johannes Berg
2019-12-12 10:55 ` Toke Høiland-Jørgensen
2019-12-12 11:00 ` Johannes Berg
2019-12-21 0:55 ` Jens Axboe
2019-12-21 9:17 ` Johannes Berg
2019-12-21 13:45 ` Jens Axboe
2019-12-11 13:45 ` Johannes Berg
2019-12-11 14:09 ` Toke Høiland-Jørgensen
2019-12-11 14:13 ` Johannes Berg
2019-12-11 14:55 ` Toke Høiland-Jørgensen
2019-12-11 21:19 ` Johannes Berg
2019-12-12 10:55 ` Toke Høiland-Jørgensen
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