On Tue, Apr 2, 2019 at 7:26 PM Matthew Wilcox <wi...@infradead.org> wrote: > > On Tue, Apr 02, 2019 at 01:55:03PM +0800, Qiang Yu wrote: > > Thanks, patch is: > > Reviewed-by: Qiang Yu <yuq...@gmail.com> > > This looks like a fairly naive conversion from the old IDR API to the > XArray API. You should be able to remove mgr->lock entirely, relying on > the xa_lock for synchronising free and get.
I'm afraid the a little complex free path may involve some might sleep functions so use a mutex lock instead of spinlock. > If you think it's worth it, > you could even use kfree_rcu() to free the ctx and kref_get_unless_zero() > and then your get path would be lock-free. I can take a look this way, thanks. _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
