[lkml]   [2003]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [RFC] Simplify node/zone portion of page->flags
    On Sun, Nov 23, 2003 at 02:49:03PM -0800, Jesse Barnes wrote:
    > On Sun, Nov 23, 2003 at 02:40:52PM -0800, Andrew Morton wrote:
    > > > zone_num. This makes it trivial to recover either the node or zone
    > > > number with a simple bitshift. There are many places in the kernel
    > > > where we do things like: page_zone(page)->zone_pgdat->node_id to
    > > > determine the node a page belongs to. With this patch we save several
    > > > pointer dereferences, and it boils down to shifting some bits.
    > >
    > > This rather conflicts with the patch from Jesse which I have. Can you guys
    > > work that out and let me know when you're done?
    > I like Matt's patch, but haven't tested it yet. I'll try it out on
    > Monday.

    Matt, this looks ok (at least it boots on my test system). I wasn't
    able test it on a very large system though, but it looks functionally
    identical to the patch in Andrew's tree. Btw, you probably want to put
    () around NODEZONE_SHIFT + ZONES_SHIFT in page_nodenum() otherwise gcc
    will complain loudly.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:58    [W:0.021 / U:6.272 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site