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

On Mon, Mar 02, 2026 at 04:59:06PM +0100, Sumanth Korikkar wrote:
> * When --sysroot is used, do not read /sys/firmware/memory
>   (used on s390). This makes sure lsmem reads only the memory
>   directories inside the given sysroot, so the directory list
>   is correct.

Hi Sumanth,

Thanks for looking into this. I think your patch is a workaround
though. It bypasses sysmemconfig and memmap_on_memory when --sysroot
is used rather than fixing the root cause.

The real problem is that --sysroot prefix was not applied to all sysfs
paths. The sysmemconfig handler was never prefixed, and print_summary()
used raw fopen() to read memmap_on_memory, completely ignoring --sysroot.

I've pushed different solution fix to
https://github.com/util-linux/util-linux/pull/4090 

This way all sysfs reads go through the prefix, and tests produce
consistent results regardless of the host system.

  Karel

-- 
 Karel Zak  <[email protected]>
 http://karelzak.blogspot.com