Re: linux-next: manual merge of the slab tree with the rcu tree

On Fri, Jul 31, 2026 at 03:01:37PM -0700, Nathan Chancellor wrote:
> On Fri, Jul 31, 2026 at 11:14:42PM +0200, Alice Ryhl wrote:
> > I like Nathan's fix as well.
> > 
> > Not sure if it needs to be done in the merge commit, or if we can
> > apply it as a patch to char-misc despite the unknown CFG_*?
> 
> It would need to be applied at the merge of the two trees because
> CONFIG_KVFREE_RCU_BATCHED was introduced back in 6.15 in commit
> c9f8f1242a4c ("slab: don't batch kvfree_rcu() with SLUB_TINY").

Is that required? Yes, the cfg(CONFIG_KVFREE_RCU_BATCHED) will fail in
Greg's tree because the CFG doesn't exist and is hence not enabled ...
but the cfg not applying is what we want.

The main risk I can think of is a warning about an unknown CFG being
used. Perhaps we could silence the warning?

Or I mean, we can also just fix it in the merge commit if that works for
everyone.

Alice