On 3/13/22 10:09 AM, Muhammad Usama Anjum wrote:

Hi,

On linux-next cd tools/testing/selftests/futex && make clean -j 32 gives warning make[1]: warning: jobserver unavailable: using -j1. Add '+' to parent make rule. The full logs with with different reproduction steps can be found here: https://storage.staging.kernelci.org/next/master/next-20220310/x86_64/x86_64.... Usually this type of warning shouldn't come when $MAKE is being used instead of make in Makefile.

Maybe `define CLEAN` inside override construct defined in parent makefile is not getting jobsever information when child make process executes. I've enabled verbose mode and tried with other makefile flags (-p, -d etc) as well. Documentation mentions that if make is unable to identify the child process correctly, this warning will appear.

Please share if you have any thoughts on it.

futex test defines its own clean to catch all the sub-directories overriding common clean. Changing it not override won't do the clean properly.

Propose a fix that works for -j build as well keeping override in place.

thanks, -- Shuah