Received-SPF: pass (google.com: domain of linux-wireless-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <a159fe51-5324-cafe-1977-4604f58de247@nbd.name>
Date:   Wed, 21 Sep 2022 12:38:45 +0200
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0)
 Gecko/20100101 Thunderbird/91.13.0
Subject: Re: [PATCH v2] wifi: mac80211: Fix performance issue with mutex_lock
Content-Language: en-US
To:     Venkat Ch <venkatch@gmail.com>
Cc:     johannes@sipsolutions.net, linux-wireless@vger.kernel.org,
        Venkat Chimata <venkata@shasta.cloud>
References: <20220915043527.737133-1-venkatch@gmail.com>
 <238a21a8-c97b-5a38-6c08-9057055bf73f@nbd.name>
 <CABHL29H75U-0dBP14d-6ds-xMPt1eqrvQPuMp3oY8qQS8Y3Dbw@mail.gmail.com>
 <9acc4159-8223-bbca-a83f-d075660ac6db@nbd.name>
 <CABHL29GB6DCrdu4FzRfBDSj9A7pwqnWE+wgH2xfkBMLjT3bAxA@mail.gmail.com>
 <f75ad975-8b76-f3e6-151b-6eda552c0431@nbd.name>
 <CABHL29GUgta4Ke3sxbongMSK__cruTaDYCXe1-yEDL3WA3mO9Q@mail.gmail.com>
 <4040f674-8430-69ba-1b6f-f9fd92da413d@nbd.name>
 <CABHL29FkAKk7=MJ6J=wUzXkuYJ=M5DYE0nk5sHWxwz26FuYjrg@mail.gmail.com>
From:   Felix Fietkau <nbd@nbd.name>
In-Reply-To: <CABHL29FkAKk7=MJ6J=wUzXkuYJ=M5DYE0nk5sHWxwz26FuYjrg@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

On 21.09.22 10:31, Venkat Ch wrote:
> Hi Felix,
> 
>   Thanks again for patiently discussing things. I clearly understand
> what you said about locks. Now that we know the background of the
> problem, do you suggest any potential solution or any potential
> direction that I should start investigating? Please let me know.

Maybe try enabling lockdep and see if anything shows up.

- Felix