Messages in this thread | | | Date | Thu, 7 Oct 2010 08:44:59 +0530 | From | Balbir Singh <> | Subject | Re: [RFC] Restrict size of page_cgroup->flags |
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* nishimura@mxp.nes.nec.co.jp <nishimura@mxp.nes.nec.co.jp> [2010-10-07 09:54:58]:
> On Wed, 6 Oct 2010 19:53:14 +0530 > Balbir Singh <balbir@linux.vnet.ibm.com> wrote: > > > I propose restricting page_cgroup.flags to 16 bits. The patch for the > > same is below. Comments? > > > > > > Restrict the bits usage in page_cgroup.flags > > > > From: Balbir Singh <balbir@linux.vnet.ibm.com> > > > > Restricting the flags helps control growth of the flags unbound. > > Restriciting it to 16 bits gives us the possibility of merging > > cgroup id with flags (atomicity permitting) and saving a whole > > long word in page_cgroup > > > I agree that reducing the size of page_cgroup would be good and important. > But, wouldn't it be better to remove ->page, if possible ? >
Without the page pointer, how do we go from pc to page for reclaim?
-- Three Cheers, Balbir
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