From: Rajkumar Manoharan <rmanohar@codeaurora.org>
To: "Toke Høiland-Jørgensen" <toke@toke.dk>
Cc: Jonathan Morton <chromatix99@gmail.com>,
Kan Yan <kyan@google.com>,
make-wifi-fast@lists.bufferbloat.net,
linux-wireless-owner@vger.kernel.org,
linux-wireless@vger.kernel.org, Felix Fietkau <nbd@nbd.name>
Subject: Re: [Make-wifi-fast] [PATCH RFC v4 3/4] mac80211: Add airtime accounting and scheduling to TXQs
Date: Tue, 02 Oct 2018 16:07:34 -0700 [thread overview]
Message-ID: <30cf3754fa970aa1af11791c2625a7c9@codeaurora.org> (raw)
In-Reply-To: <877ej0b2d8.fsf@toke.dk>
On 2018-10-02 12:00, Toke Høiland-Jørgensen wrote:
> Rajkumar Manoharan <rmanohar@codeaurora.org> writes:
>> I noticed a race condition b/w sta cleanup and kick_airtime tasklet.
>>>> How do you plan to exit kick_airtime gracefully during sta_cleanup?
>>>
>>> Ah, right, there's a lot of stuff going on before we get to
>>> purge_txq.
>>> Hmm, I guess we should either make sure we remove the station from
>>> active_txqs earlier in the sta cleanup process, or maybe it'd enough
>>> to
>>> just check the removed flag in the tasklet?
>>>
>>> Does the below patch fix the issue?
>>>
>>
>> No. Attaching backtrace. Any clue?
>
> Ah, that's my bad. Just having a 'continue' there can make the function
> loop forever. Oops. Try something like this instead?
>
But 'continue' also used in other places. Will give a try but I think
that
calling drv_wake_tx_queue within iteration is dangerous as it alters the
list. no?
-Rajkumar
next prev parent reply other threads:[~2018-10-02 23:07 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-16 17:42 [Make-wifi-fast] [PATCH RFC v4 0/4] Move TXQ scheduling into mac80211 Toke Høiland-Jørgensen
2018-09-16 17:42 ` [Make-wifi-fast] [PATCH RFC v4 4/4] ath9k: Switch to mac80211 TXQ scheduling and airtime APIs Toke Høiland-Jørgensen
2018-09-16 17:42 ` [Make-wifi-fast] [PATCH RFC v4 3/4] mac80211: Add airtime accounting and scheduling to TXQs Toke Høiland-Jørgensen
2018-09-26 7:09 ` Rajkumar Manoharan
2018-09-26 9:22 ` Toke Høiland-Jørgensen
2018-09-27 0:09 ` Rajkumar Manoharan
2018-09-28 5:29 ` Rajkumar Manoharan
2018-09-28 7:51 ` Toke Høiland-Jørgensen
2018-09-28 9:27 ` Rajkumar Manoharan
2018-09-28 9:44 ` Rajkumar Manoharan
2018-09-28 9:58 ` Toke Høiland-Jørgensen
2018-09-28 10:19 ` Rajkumar Manoharan
2018-09-28 10:35 ` Jonathan Morton
2018-09-28 10:47 ` Rajkumar Manoharan
2018-09-28 11:02 ` Toke Høiland-Jørgensen
2018-09-28 19:51 ` Rajkumar Manoharan
2018-10-02 6:58 ` Rajkumar Manoharan
2018-10-02 7:41 ` Rajkumar Manoharan
2018-10-02 8:22 ` Toke Høiland-Jørgensen
2018-10-02 16:33 ` Rajkumar Manoharan
2018-10-02 19:00 ` Toke Høiland-Jørgensen
2018-10-02 23:07 ` Rajkumar Manoharan [this message]
2018-10-03 5:53 ` Rajkumar Manoharan
2018-10-03 6:27 ` Rajkumar Manoharan
2018-10-03 8:41 ` Toke Høiland-Jørgensen
2018-09-16 17:42 ` [Make-wifi-fast] [PATCH RFC v4 1/4] mac80211: Add TXQ scheduling API Toke Høiland-Jørgensen
2018-09-18 0:57 ` Rajkumar Manoharan
2018-09-18 10:29 ` Toke Høiland-Jørgensen
2018-09-18 18:51 ` Rajkumar Manoharan
2018-09-18 20:41 ` Toke Høiland-Jørgensen
2018-09-18 21:30 ` Rajkumar Manoharan
2018-09-19 9:09 ` Toke Høiland-Jørgensen
2018-09-19 14:43 ` Kalle Valo
2018-09-19 14:50 ` Toke Høiland-Jørgensen
2018-09-19 16:54 ` Rajkumar Manoharan
2018-09-16 17:42 ` [Make-wifi-fast] [PATCH RFC v4 2/4] cfg80211: Add airtime statistics and settings Toke Høiland-Jørgensen
2018-09-20 21:29 ` [Make-wifi-fast] [PATCH RFC v4 0/4] Move TXQ scheduling into mac80211 Rajkumar Manoharan
2018-09-21 12:41 ` Toke Høiland-Jørgensen
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