[PATCH 1/1] log: output for CONFIG_LOG=n

Heinrich Schuchardt xypron.glpk at gmx.de
Sun Feb 9 23:33:36 CET 2020

On 2/9/20 11:21 PM, Sean Anderson wrote:
> On 2/9/20 4:59 PM, Heinrich Schuchardt wrote:
>> If CONFIG_LOG=n, we should still output errors, warnings, notices, infos,
>> and for DEBUG=1 also debug messages.
>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Why not just change the default for CONFIG_LOG to y? This is effectively
> the same, except it still allows users to completely disable logging
> altogether.
> --Sean

I have tested your suggestion for qemu_arm64_defconfig:

Without my patch and CONFIG_LOG=n:

u-boot.bin 664200 bytes

With my patch and CONFIG_LOG=n:

u-boot.bin 664432 bytes

Without my patch but with CONFIG_LOG=y and CONFIG_CONSOLE=y:

u-boot.bin 666648 bytes

So your suggestion consumes 2216 additional bytes to produce the
essentially the same console output.

IMHO CONFIG_LOG=y is currently only helpful in the following situation:

* You are debugging your board and want to interactively change
   logging levels.
* You want to log to a remote syslog server.

Best regards


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