Re: [PATCH] proc: faster /proc/*/status

From: Andi Kleen
Date: Sun Aug 07 2016 - 13:44:16 EST


> > > It is so bloated that gcc needs to be asked to not screw up with stack
> > > size.
> > What happens when you drop all the noinlines for this? I assume
> > this would alread make it faster. And now that we have bigger
> > stacks we can likely tolerate it.
>
> %pV recurses through these code paths.
> I believe the maximum current recursion depth is 3.

I assume 2 max would sufficient for all users in kernel.

And perhaps it would be better to get rid of "features" like this,
and instead focus on more common cases.

-Andi

--
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.