On Thu, 2005-06-30 at 14:52 +0900, YAMAMOTO Takashi wrote:
> > +static inline void
> > +ckrm_clear_page_class(struct page *page)
> > +{
> > + struct ckrm_zone *czone = page_ckrmzone(page);
> > + if (czone == NULL)
> > + return;
> > + sub_use_count(czone->memcls, 0, page_zonenum(page), 1);
> > + kref_put(&czone->memcls->nr_users, memclass_release);
> > + set_page_ckrmzone(page, NULL);
> > }
>
> are you sure if it's safe?
> this function is called with zone->lock held,
> and memclass_release calls kfree.
i don't understand why you think it is a problem to call kfree with lock
held( i agree calling kmalloc with wait flag when a lock is being held
is not correct).
>
> YAMAMOTO Takashi
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