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    SubjectRe: [PATCH][2.6] No swapping on memory backed swapfiles
    Date
    In article <200310130832.h9D8WJ4g000157@81-2-122-30.bradfords.org.uk>,
    John Bradford <john@grabjohn.com> wrote:
    | Quote from Andrew Morton <akpm@osdl.org>:
    | > Zwane Mwaikambo <zwane@arm.linux.org.uk> wrote:
    | > >
    | > > + bdi = mapping->backing_dev_info;
    | > > + if (bdi->memory_backed)
    | > > + goto bad_swap;
    | > > +
    | >
    | > I guess that makes sense, although someone might want to swap onto a
    | > ramdisk-backed file just for some testing purpose.
    |
    | Or because some RAM is slower than the rest. This came up a while ago
    | on the list.

    Something on my "learn how to..." list, I have some systems which are
    setup to cache only the first 64MB, and I bet they would run a lot
    faster if the rest were used as swap. It is definitely faster with
    mem=64 than letting the CPU beat the whole memory.
    --
    bill davidsen <davidsen@tmr.com>
    CTO, TMR Associates, Inc
    Doing interesting things with little computers since 1979.
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