* synchronization question about sdata->skb_queue
@ 2017-09-09 1:28 dztemplor .
2017-09-09 1:35 ` dztemplor .
0 siblings, 1 reply; 2+ messages in thread
From: dztemplor . @ 2017-09-09 1:28 UTC (permalink / raw)
To: linux-wireless
Hi, everyone.
I'm a newbie in mac80211 and have a question about synchronization for
sdata->skb_queue.
sdata->skb_queue is shared between ieee80211_iface_work() and rx
handlers like ieee80211_rx_h_action()
ieee80211_iface_work() runs in process context.
ieee80211_rx_h_action() runs in softirq context.
why there is no spin_lock_bh() in ieee80211_iface_work() when it
dequeues from sdata->skb_queue?
I know the question may sounds stupid, will appreciate if anyone can
explain to me.
Regards,
Spike.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: synchronization question about sdata->skb_queue
2017-09-09 1:28 synchronization question about sdata->skb_queue dztemplor .
@ 2017-09-09 1:35 ` dztemplor .
0 siblings, 0 replies; 2+ messages in thread
From: dztemplor . @ 2017-09-09 1:35 UTC (permalink / raw)
To: linux-wireless
sorry, just realized skb_dequeue() will call spin_lock_irqsave() inside.
please ignore this question.
On Sat, Sep 9, 2017 at 9:28 AM, dztemplor . <zdu.shanghai@gmail.com> wrote:
> Hi, everyone.
> I'm a newbie in mac80211 and have a question about synchronization for
> sdata->skb_queue.
> sdata->skb_queue is shared between ieee80211_iface_work() and rx
> handlers like ieee80211_rx_h_action()
> ieee80211_iface_work() runs in process context.
> ieee80211_rx_h_action() runs in softirq context.
> why there is no spin_lock_bh() in ieee80211_iface_work() when it
> dequeues from sdata->skb_queue?
> I know the question may sounds stupid, will appreciate if anyone can
> explain to me.
>
> Regards,
> Spike.
^ permalink raw reply [flat|nested] 2+ messages in thread
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