"Perez-Gonzalez, Inaky" wrote:
>
> >Oleg Nesterov wrote:
> >>
> >> Daniel Walker wrote:
> >> >
> >> > Description:
> >> > This patch adds the priority list data structure from Inaky Perez-Gonzalez
> >> > to the Preempt Real-Time mutex.
> >> >
> >> ...
> >And I think it is possible to simplify plist's design.
> >
> > ...
> >
> >lt_prio:
> > list_add_tail(&new->prio_list, &pos->prio_list);
> >eq_prio:
> > list_add_tail(&new->node_list, &pos->node_list);
> >}
>
> Isn't this adding them to *both* lists in the lt_prio
> case? I don't understand what do you want to accomplish
> in this case.
Yes. ->node_list contains *ALL* nodes, that is why we can:
#define plist_for_each(pos, head) \
list_for_each_entry(pos, &(head)->node_list, node_list)
head <=======> prio=1 <===> prio=2 <===> ...
/\ /| /\
| | |
\/ | \/
prio=1 | prio=2
/\ / /\
| / |
\/ / \/
prio=1 / ....
<---/
/\
Where <===> means ->prio_list, | ->node_list.
\/
Daniel Walker wrote:
>
> Make a patch .
Will do. However, I'm unfamiliar with Ingo's tree, so I
can send only new plist's implementation.
Oleg.
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