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    Subject[patch] netconsole-2.4.10-B1

    On Wed, 26 Sep 2001, Marcelo Tosatti wrote:

    > Don't you think it would be useful to have some reserved memory for
    > the netconsole use ?
    > It would be nice to have a guarantee that messages are sent over
    > network even if the system is under real OOM.

    yep, that is very useful indeed.

    i've implemented a private emergency pool of 32 packets that we try to
    keep filled as much as possible, and which one we use only if GFP_ATOMIC
    fails. The new patch can downloaded from:

    http://redhat.com/~mingo/netconsole-patches/netconsole-2.4.10-B1

    the patch also includes Andrew Morton's suggestion to add the
    HAVE_POLL_CONTROLLER define for easier network-driver integration. The
    eepro100.c changes now use this define.

    the new utilities-tarball is at:

    http://redhat.com/~mingo/netconsole-patches/netconsole-client-20010927.tar.gz

    this includes Andreas Dilger's netconsole-server script. (i've done a
    minor modification to the script, it insmods the netconsole module with
    the parameters.)

    there is one more thing we could do: we could also allocate the skb on
    stack in extreme cases. This adds noticeable latency though, since the skb
    xmit has to be polled for completion as well [this can be done with the
    current ->poll_controller() method], but this way the netconsole could be
    self-sufficient and would be completely independent of the VM.

    reports, suggestions, comments welcome,

    Ingo

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