[LTP] [PATCH v6] lib: Use backoff polling to wait for loop device nodes

[Petr Vorel]

Hi all,

> d90d2004657b ("lib: Use backoff polling to wait for loop
>   device nodes")

> This patch introduces a regression in few old API based tests which
> call tst_acquire_device() -> tst_find_free_loopdev()/tst_attach_device()):

>     - linkat02
>     - mknodat02
>     - rename11
>     - renameat01
>     - umount2_01

> these fail with
> tst_kconfig.c:90: TINFO: Parsing kernel config '/proc/config.gz'
> linkat02    1  TBROK  :  tst_sig.c:232: unexpected signal SIGCHLD(17)
> received (pid = 122504).
> linkat02    2  TBROK  :  Remaining cases broken

> which comes from def_handler(int sig) in lib/tst_sig.c

> The old API treats SIGCHLD as fatal, which is now being generated while
> reading the kconfig file. So we need to address this until we convert
> these tests to new API, maybe by intentionally avoiding
> TST_RETRY_FN_EXP_BACKOFF()/tst_multiply_timeout() for now.

Avinesh, thanks for the report.

I vote to revert d90d2004657b until we convert the tests above.
Anybody objects?

If you reply ack, I can revert it later tonight/tomorrow morning (UTC timezone)
and add your ABT to the commit.

Kind regards,
Petr

> Regards,
> Avinesh