Re: [PATCH] debugobjects: Allow to configure the amount of pre-allocated objects

[Andrew Morton]

On Fri, 13 Mar 2026 15:26:20 +0100 Benjamin Block <bblock@xxxxxxxxxxxxx> wrote:

> > obj_static_pool[] is __initdata, so the consequences of making it large
> > are very slight.  So do we really need
> > CONFIG_DEBUG_OBJECTS_POOL_SIZE_SHIFT?  Requiring a rebuild is a huge
> > hassle.  How about simply making the static pool much larger and leave
> > it at that?
> 
> I was thinking about that but then couldn't decide what would be "big enough"
> as constant value for "everyone". My test systems wasn't even that "big", and
> I'm already at 1280 KiB reservation to make ODEBUG "survive" the boot. Not
> sure I want to make this say 2 MiB without config option for everyone.

2MB of initmem probably just doesn't matter.  Annoying.

Do you understand *why* s390 is using so many objects?  Presumably the
current much smaller default is OK for most systems - my googling for
"Out of memory.  ODEBUG disabled" turned up very little.

Oh, look what I found. 
https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg1807440.html
What happened to that?