lkml.org 
[lkml]   [2004]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [ANNOUNCE] Linux 2.6 Real Time Kernel

    * Dipankar Sarma <dipankar@in.ibm.com> wrote:

    > It seems that way to me too. Long ago I implemented preemptible RCU,
    > but did not follow it through because I believed it was not a good
    > idea. The original patch is here :
    >
    > http://www.uwsg.iu.edu/hypermail/linux/kernel/0205.1/0026.html
    >
    > This allows read-side critical sections of RCU to be preempted. It
    > will take a bit of work to re-use it in RCU as of now, but I don't
    > think it makes sense to do so. My primary concern is DoS/OOM situation
    > due to preempted tasks holding up RCU.

    the DoS/OOM problems are serious i believe. Preemptible RCU in that
    sense is 'RCU with no guarantee of progress', which sounds bad from a
    design POV.

    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 14:07    [W:4.159 / U:0.068 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site