lkml.org 
[lkml]   [2010]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC] Restrict size of page_cgroup->flags
    * 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


    \
     
     \ /
      Last update: 2010-10-07 05:17    [W:0.024 / U:60.180 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site