From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dmitry Osipenko <digetx@gmail.com>
Subject: Re: [RFC PATCH v6 6/9] media: tegra: Add Tegra210 Video input driver
Date: Tue, 7 Apr 2020 00:11:13 +0300
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To: Sowjanya Komatineni <skomatineni@nvidia.com>, thierry.reding@gmail.com, jonathanh@nvidia.com, frankc@nvidia.com, hverkuil@xs4all.nl, sakari.ailus@iki.fi, helen.koike@collabora.com
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07.04.2020 00:02, Sowjanya Komatineni пишет:
>>>>>> Am I understanding correctly that this thread will take 100% CPU,
>>>>>> spinning here, if more than 2 frame-captures queued?
>>>>> on more than 2 frames captures, it breaks thread and on next wakeup it
>>>>> continues
>>>> The wait_event() won't wait if condition is true.
>>> condition is checked when waitqueue is woken up
>> https://elixir.bootlin.com/linux/v5.6.2/source/include/linux/wait.h#L462
> 
> process is put to sleep until the condition evaluates to true or signal
> is received.
> 
> condition is checked each time the waitqueue head is woken up.

This is a wrong assumption in accordance to the code.