On 22 Aug 2006 13:06:34 +0200
Andi Kleen <[email protected]> wrote:
> KAMEZAWA Hiroyuki <[email protected]> writes:
> >
> > listtoken , a helper for walking a list by intermittent access.
> >
> > When we walk a list intermittently and the list is being modified at the
> > same time, it's hard to remember our position in it.
> >
> > With this list token, a user can remember where he is reading by inserting
> > a token in the list.
>
> I think the header/code needs much more comments so that other people
> can still make sense of it later. Even with the commit log it's not
> quite clear how it works.
>
Okay, make them more informative.
> Also locking needs to be explained.
Yes, with RCU. we need appropriate lock.
> I suppose only one user is allowed to use a token at one time?
>
Yes, I expext that a user uses a token. But several tokens can be inserted to a list.
> But overall it's a good idea to have a generic facility like this.
> I suppose it will be a more common problem in the future.
>
Thanks,
-Kame
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