Re: [rfc/patch] mm/slub: restore/expand unfreeze_partials() local exclusion scope

[Mike Galbraith]

On Sun, 2021-07-25 at 16:16 +0200, Vlastimil Babka wrote:
> On 7/25/21 4:09 PM, Mike Galbraith wrote:
> > On Sat, 2021-07-24 at 00:39 +0200, Vlastimil Babka wrote:
> > >
> > > If not, then I would expect this to work (I don't think they ever nest
> > > in the opposite order, also lockdep should tell us instead of
> > > -ENOBOOT?), but might be missing something...
> >
> > Yeah, like #ifndef CONFIG_PREMPT_RT at the bottom of the loop that our
> > useless damn eyeballs auto-correct instead of reporting :)
>
> Well doh, good catch.

I never did see it.  I got sick of saying "but but but", and did make
mm/slub.i, which made it glow.

> Hope fixing that helps then?

Yeah, though RT should perhaps be pinned across release/re-acquire?

Actually, local locks should rediscover the recursion handling skills
they long had so such RT specific hole poking isn't necessary.  There
previously would have been no ifdef+typo there for eyeballs to miss and
miss and miss.

	-Mike