[lkml]   [2001]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [patch] 4GB I/O, cut three
    On Wed, May 30 2001, Andrea Arcangeli wrote:
    > > > I did change the patch so that bounce-pages always come from the NORMAL
    > > > zone, hence the ZONE_DMA32 zone isn't needed. I avoided the new zone, as
    > > > I'm not 100% sure the VM is capable of keeping the zones it already has
    > > > balanced - and adding another one might break the camels back. But as the
    > > > test box has 4GB, it wasn't bouncing anyway.
    > >
    > > You are right, this is definitely something that needs checking. I
    > > really want this to work though. Rik, Andrea? Will the balancing handle
    > > the extra zone?
    > The bounces can came from the ZONE_NORMAL without problems, however the

    Of course

    > ZONE_DMA32 way is fine too, but yes probably it isn't needed in real
    > life unless you do an huge amount of I/O at the same time. If you want

    It's not strictly needed, but it does buy us 3 extra gig to do I/O from
    an a pae enabled x86.

    > to reduce the amount of changes you can defer the zone_dma32 patch and
    > possibly plug it in later.

    Yes, I did modular patches for this reason.


    Jens Axboe

    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 12:54    [W:0.020 / U:3.740 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site