Re: [ANNOUNCE] util-linux v2.42-rc1

[Sumanth Korikkar]

Hi Chris,

> Hi Sumanth, looong64 porters,
> 
> * Karel Zak <kzak@xxxxxxxxxx> [260226 14:53]:
> > The util-linux release v2.42-rc1 is now available at
> >  http://www.kernel.org/pub/linux/utils/util-linux/v2.42/
> [..]
> > lsmem:
> >    - display global memmap on memory parameter (by Sumanth Korikkar)
> 
> It appears the test for this is run on looong64 and fails there (failing the
> entire build), at least in the Debian build infra.
> https://buildd.debian.org/status/fetch.php?pkg=util-linux&arch=loong64&ver=2.42%7Erc1-1&stamp=1772312955&raw=0
> 
> See below for log output excerpts.
> 
> Thanks,
> Chris
> 
> 
> log snippets:
> 
> ================= O/E diff ===================
> --- /build/reproducible-path/util-linux-2.42~rc1/tests/output/lsmem/lsmem-s390-zvm-6g	2026-02-28 21:08:31.577617951 +0000
> +++ /build/reproducible-path/util-linux-2.42~rc1/tests/expected/lsmem/lsmem-s390-zvm-6g	2026-02-18 11:33:47.804188659 +0000
> @@ -17,6 +17,7 @@
>  Memory block size:                256M
>  Total online memory:              4.8G
>  Total offline memory:             1.3G
> +Memmap on memory parameter:         no

The ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE feature is currently not enabled on
loong64.

The lsmem tool displays the setting found in
/sys/module/memory_hotplug/parameters/memmap_on_memory.  If this path
does not exist, lsmem will not show the parameter. As a result, the test
fails.

To resolve this, the test should first verify whether the file
/sys/module/memory_hotplug/parameters/memmap_on_memory exists. If it is
missing, the test should skip the output related to the "Memmap
on memory parameter". I will check how the test logic can be updated and
give it a try.

Thanks & Regards,
Sumanth