[RFC] Restrict size of page_cgroup->flags
kamezawa.hiroyu at jp.fujitsu.com
Wed Oct 6 16:58:58 PDT 2010
On Wed, 6 Oct 2010 19:53:14 +0530
Balbir Singh <balbir at 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 at 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
> Signed-off-by: Balbir Singh <balbir at linux.vnet.ibm.com>
Doesn't make sense until you show the usage of existing bits.
And I guess 16bit may be too large on 32bit systems.
Nack for now.
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