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

Hi Andrew,

-----Original Message-----
From: Andrew Lunn <andrew@lunn.ch>
Sent: 2021年6月16日 21:06
To: Joakim Zhang <redacted>
Cc: David Miller <davem@davemloft.net>; kuba@kernel.org;
frieder.schrempf@kontron.de; netdev@vger.kernel.org;
linux-kernel@vger.kernel.org
Subject: Re: [PATCH V2 net-next 0/2] net: fec: fix TX bandwidth fluctuations

quoted

I try below build options, also can't reproduce this issue, so really don't know

how to fix it.

quoted

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

quoted

I saw many unrelated warnings...

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

After applying the patch #2, I tried to use C=1 yesterday, I double check it today, still no warnings. Anything I missing?

$ make -j8 ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- W=1,C=1
  CALL    scripts/atomic/check-atomics.sh
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  drivers/net/ethernet/freescale/fec_main.o
  LD [M]  drivers/net/ethernet/freescale/fec.o
  MODPOST modules-only.symvers
  GEN     Module.symvers
  CC [M]  drivers/net/ethernet/freescale/fec.mod.o
  LD [M]  drivers/net/ethernet/freescale/fec.ko

Best Regards,
Joakim Zhang

     Andrew