Re: [PATCH 1/1] ext4: Replace ext4_kvfree_array_rcu() by kvfree_rcu_mightsleep()

[Uladzislau Rezki]

On Fri, Mar 17, 2023 at 05:31:04PM -0700, Paul E. McKenney wrote:
> On Fri, Mar 17, 2023 at 08:15:58AM +0100, Uladzislau Rezki (Sony) wrote:
> > The ext4_kvfree_array_rcu() function was introduced in order to
> > release some memory after a grace period during resizing of a
> > partition. An object that is freed does not contain any rcu_head
> > filed.
> > 
> > To do so, it requires to allocate some extra memory for a special
> > structure that has an rcu_head filed and pointer one where a freed
> > memory is attached. Finally call_rcu() API is invoked.
> > 
> > Since we have a single argument of kvfree_rcu() API, we can easily
> > replace all that tricky code by one single call that does the same
> > but in more efficient way.
> > 
> > Cc: linux-ext4@xxxxxxxxxxxxxxx
> > Cc: Lukas Czerner <lczerner@xxxxxxxxxx>
> > Cc: Andreas Dilger <adilger.kernel@xxxxxxxxx>
> > Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
> 
> From an RCU perspective:
> 
> Reviewed-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> 
Thank you!

--
Uladzislau Rezki