Re: [QUESTION] llist: Comment releasing 'must delete' restriction before traversing

From: Byungchul Park
Date: Wed Aug 01 2018 - 04:53:01 EST

On Wed, Aug 01, 2018 at 01:43:10PM +0800, Huang, Ying wrote:
> Byungchul Park <byungchul.park@xxxxxxx> writes:
> > I think rcu list also works well. But I decided to use llist because
> > llist is simpler and has one less pointer.
> >
> > Just to be sure, let me explain my use case more:
> >
> > 1. Introduced a global list where single linked list is sufficient.
> > 2. All operations I need is to add items and traverse the list.
> > 3. Ensure the operations always happen within irq-disabled section.
> > 4. I'm considering CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG properly.
> > 5. The list can be accessed by every CPU concurrently.
> >
> Can you provide more information about where is your use case? Is it a
> kernel driver? Then it is better to submit the patch together with its
> user.
> And I have the similar concern as Steven Rostedt. That is, if you are
> the only user forever, it's not necessary to change the common code.

I'm sorry the patch is too complicated and premature to share at the
moment so I don't know how to extract only what you're asking me for.

Thanks anyway. The common code doesn't have to be changed then.

> Best Regards,
> Huang, Ying