Re: maple_tree.c:3738:1: error: the frame size of 1040 bytes is larger than 1024 bytes

[David Laight]

On Fri, 5 Dec 2025 01:49:00 +0100 (CET)
Christian Kujau <lists@xxxxxxxxxxxxxxx> wrote:

> Hi Tiffany,
> 
> On Tue, 25 Nov 2025, Tiffany Yang wrote:
> > Sorry to resurrect this old thread, but I wanted to reply in case you
> > were still thinking about this for whatever reason. I was running into a  
> 
> Sorry for the late response. And thanks for resurrecting!
> 
> > I'm not sure how you set your config initially, but what jumps out at me
> > is that CONFIG_STACK_WARN=1024 even though
> > CONFIG_64BIT=y. CONFIG_STACK_WARN defaults to 2048 for 64-bit builds,  
> 
> Interesting. I really did "allnoconfig" and then turned on a few debug 
> options via "menuconfig", I did not set CONFIG_STACK_WARN manually. Thanks 
> for spotting this, I'll look into my cross-build routine if something 
> funny happens there.
> 
> > which is why other people don't seem to be running into this issue (at
> > least from glancing over the mailing list).
> > 
> > Obviously, this doesn't solve the actual problem, but from Liam's reply
> > further up in the thread, it looks like he's working on a fix, so now
> > you can keep your eye out for that!  
> 
> Yes, a proper fix would be great too.

Can't remember if I mentioned it before, but I suspect that letting
mas_commit_b_node() be inlined and then stopping both mas_rebalance()
and mas_split() being inlined into it (both of which are big and slow)
for all builds (not just KASAN ones) will reduce the overall stack slightly.

	David


> 
> cheers,
> Christian.