* KAMEZAWA Hiroyuki <[EMAIL PROTECTED]> [2008-01-10 11:36:18]:

> On Thu, 10 Jan 2008 07:51:33 +0530
> Balbir Singh <[EMAIL PROTECTED]> wrote:
> 
> > > >  #define PAGE_CGROUP_FLAG_CACHE (0x1)   /* charged as cache */
> > > >  #define PAGE_CGROUP_FLAG_ACTIVE (0x2)  /* page is active in this 
> > > > cgroup */
> > > > +#define PAGE_CGROUP_FLAG_FILE  (0x4)   /* page is file system backed */
> > > > 
> > > 
> > > Now, we don't have control_type and a feature for accounting only CACHE.
> > > Balbir-san, do you have some new plan ?
> > >
> > 
> > Hi, KAMEZAWA-San,
> > 
> > The control_type feature is gone. We still have cached page
> > accounting, but we do not allow control of only RSS pages anymore. We
> > need to control both RSS+cached pages. I do not understand your
> > question about new plan? Is it about adding back control_type?
> > 
> Ah, just wanted to confirm that we can drop PAGE_CGROUP_FLAG_CACHE
> if page_file_cache() function and split-LRU is introduced.
> 

Earlier we would have had a problem, since we even accounted for swap
cache with PAGE_CGROUP_FLAG_CACHE and I think page_file_cache() does
not account swap cache pages with page_file_cache(). Our accounting
is based on mapped vs unmapped whereas the new code from Rik accounts
file vs anonymous. I suspect we could live a little while longer
with PAGE_CGROUP_FLAG_CACHE and then if we do not need it at all,
we can mark it down for removal. What do you think?


-- 
        Warm Regards,
        Balbir Singh
        Linux Technology Center
        IBM, ISTL
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Reply via email to