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    SubjectRe: [PATCH] 2/5: Device-mapper: kcopyd
    On Wed, Jun 02, 2004 at 08:41:26PM -0700, Andrew Morton wrote:
    > What is the page pool for?

    On the I/O path it can't wait for pages to be allocated without
    risking deadlock. (cf. pvmove in 2.4)


    > Why are the pooled pages locked?

    I can't see that having any effect (i.e. unnecessary).


    > > +static int __init jobs_init(void)
    > > + INIT_LIST_HEAD(&_complete_jobs);
    > > + INIT_LIST_HEAD(&_io_jobs);
    > > + INIT_LIST_HEAD(&_pages_jobs);

    > Do these lists need to be initialised a second time?

    No:-)


    Alasdair
    --
    agk@redhat.com
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