netdev - Re: [PATCH V2 net-next 0/2] net: fec: fix TX bandwidth fluctuations

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Date:   Wed, 16 Jun 2021 15:06:17 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Joakim Zhang <qiangqing.zhang@....com>
Cc:     David Miller <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "frieder.schrempf@...tron.de" <frieder.schrempf@...tron.de>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH V2 net-next 0/2] net: fec: fix TX bandwidth fluctuations

> I try below build options, also can't reproduce this issue, so really don't know how to fix it.
> 
> make ARCH=arm64 distclean
> make ARCH=arm64 allmodconfig
> make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- W=1 / make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- W=2 / make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- W=3
> 
> I saw many unrelated warnings...

Then it could be sparse. Install sparse and use C=1.

     Andrew