Re: [LTP] [PATCH] lib: add TST_NO_SLOW_KCONFIG_CHECK macro for testcase tools

Petr Vorel
2025-01-17T08:05:23Z

Hi Li,

> Hi Li,

> > The macro TST_NO_SLOW_KCONFIG_CHECK is added to control whether
> > the tst_has_slow_kconfig() function (which presumably checks for
> > slow kernel configurations) should be executed.

> That was quick, thanks a lot!

> But unfortunately the patch does not help to avoid printing TINFO
> (tested on a fresh clone):

> # make && ./tst_ns_exec 14536 net,mnt sh -c " cat /proc/sys/net/ipv6/conf/ltp_ns_veth1/disable_ipv6"
> CC testcases/lib/tst_ns_exec
> make[1]: Nothing to be done for 'all'.
> tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
> tst_kconfig.c:667: TINFO: CONFIG_LATENCYTOP kernel option detected which might slow the execution
> 0

> Maybe it's because safe_clone() triggers it? Or what am I missing?

The problem why it does not work is that it uses lib/tst_test.o via
lib/libltp.a, which was compiled without TST_NO_SLOW_KCONFIG_CHECK.

IMHO We cannot easily solve this with preprocessor definition.

Kind regards,
Petr

> Kind regards,
> Petr

> > This allows test cases and tools to opt out of this additional
> > check, enabling more flexible and faster test execution in
> > certain scenarios.