Re: [RFC-PATCH 1/2] mm: Add __GFP_NO_LOCKS flag

[Paul E. McKenney]

On Fri, Aug 14, 2020 at 12:23:06PM +0200, peterz@xxxxxxxxxxxxx wrote:
> On Fri, Aug 14, 2020 at 10:30:37AM +0200, Peter Zijlstra wrote:
> > > > 1.	Prohibit invoking allocators from raw atomic context, such
> > > >	as when holding a raw spinlock.
> > > 
> > >   Clearly the simplest solution but not Pauls favourite and
> > >   unfortunately he has a good reason.
> > 
> > Which isn't actually stated anywhere I suppose ?
> 
> Introduce raw_kfree_rcu() that doesn't do the allocation, and fix the
> few wonky callsites.

The problem with that is common code along with the tendency of people
to just use the one that "works everywhere".

							Thanx, Paul