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    SubjectRe: RSDL v0.28 for 2.6.20
    On Sat, Mar 10, 2007 at 01:09:35PM -0500, Stephen Clark wrote:
    > Con Kolivas wrote:
    >
    > >Here is an update for RSDL to version 0.28
    > >
    > >Full patch:
    > >http://ck.kolivas.org/patches/staircase-deadline/2.6.20-sched-rsdl-0.28.patch
    > >
    > >Series:
    > >http://ck.kolivas.org/patches/staircase-deadline/2.6.20/
    > >
    > >The patch to get you from 0.26 to 0.28:
    > >http://ck.kolivas.org/patches/staircase-deadline/2.6.20/sched-rsdl-0.26-0.28.patch
    > >
    > >A similar patch and directories will be made for 2.6.21-rc3 without
    > >further announcement
    > >
    > >
    > >
    > doesn't apply against 2.6.20.2:
    >
    > patch -p1 <~/2.6.20-sched-rsdl-0.28.patch --dry-run
    > patching file include/linux/list.h
    > patching file fs/proc/array.c
    > patching file fs/pipe.c
    > patching file include/linux/sched.h
    > patching file include/asm-generic/bitops/sched.h
    > patching file include/asm-s390/bitops.h
    > patching file kernel/sched.c
    > Hunk #41 FAILED at 3531.
    > 1 out of 62 hunks FAILED -- saving rejects to file kernel/sched.c.rej
    > patching file include/linux/init_task.h
    > patching file Documentation/sched-design.txt

    It is easier to apply 2.6.20.2 on top of 2.6.20+RSDL. The .2 patch
    is a one-liner that you can easily fix by hand, and I'm not even
    certain that it is still required :

    --- ./kernel/sched.c.orig 2007-03-10 13:03:51 +0100
    +++ ./kernel/sched.c 2007-03-10 13:08:02 +0100
    @@ -3544,7 +3544,7 @@
    next = list_entry(queue->next, struct task_struct, run_list);
    }

    - if (dependent_sleeper(cpu, rq, next))
    + if (rq->nr_running == 1 && dependent_sleeper(cpu, rq, next))
    next = rq->idle;
    switch_tasks:
    if (next == rq->idle)
    BTW, Con, I think that you should base your work on 2.6.20.[23] and not
    2.6.20 next time, due to this conflict. It will get wider adoption.

    Regards,
    Willy

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