lkml.org 
[lkml]   [2004]   [Nov]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    Subject[patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-0

    i have released the -V0.7.28-0 Real-Time Preemption patch, which can be
    downloaded from the usual place:

    http://redhat.com/~mingo/realtime-preempt/

    this is a fixes & latency-reduction release.

    Changes since a -V0.7.27-3:

    - made the UP-ioapic code a bit more conservative again - maybe some of
    the lockups are related?

    - removed the BKL from the sound code in a cleaner way and
    removed the quite fragile 'negative ->lock_depth' code. Much less
    intrusive than i originally thought, and much cleaner as well.

    - more fixes to the wakeup-timing logic, 4 false positives fixed in
    total, mostly related to new-task-wakeup not accurately starting the
    tracer.

    - fixed the mmx-memcpy related latency reported by Florian Schmidt and
    others. Also turned off the MMX/SSE ops in the RAID code, which
    can introduce similar latencies.

    - kgdb fix from Bill Huey

    - knfsd shutdown with-BKL-held fix

    - highmem compilation fix

    - profiling related crash fix

    - implemented 'direct-path' rescheduling to further reduce scheduling
    latency: the kernel will now in most cases go from try_to_wakeup()
    into the scheduler directly without re-enabling interrupts ever again
    (and thus not giving irq handlers a window to increase latency). This
    is also the final fix for irq nesting and irq-stack recursion.

    - turn off sync wakeups on PREEMPT_RT -> they are latency generators

    to create a -V0.7.28-0 tree from scratch, the patching order is:

    http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.9.tar.bz2
    http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.10-rc2.bz2
    http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.10-rc2/2.6.10-rc2-mm1/2.6.10-rc2-mm1.bz2
    http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.10-rc2-mm1-V0.7.28-0

    Ingo
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 14:08    [W:4.448 / U:0.384 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site