Re: [PATCH 1/1] rcu/tree: Drop the lock before entering to page allocator

Sebastian Andrzej Siewior
2020-07-15T19:32:55Z

On 2020-07-15 21:02:43 [+0200], Uladzislau Rezki wrote:
>
> <snip>
> spin_lock();
> __get_free_page(GFP_NOWAIT | __GFP_NOWARN);
> spin_unlock();
> <snip>
>
> Also, please note we do it for regular kernel.

ach right okay then.

> >
> > What happened to the part where I asked for a spinlock_t?
> >
> What do you mean?

Please drop that raw_spinlock_t for the kfree_rcu() based locking and
use just a plain spinlock_t for the locking. Then you can keep the same
code flow for RT and !RT without any special cases and everything.

> --
> Vlad Rezki

Sebastian