lkml.org 
[lkml]   [1996]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: SMP locks up when NFS times out
    From
    Just to follow up to my own problem.

    I should have pointed out that my NFS mounts were with rsize=4096 and
    wsize=4096. Without that my NFS speed is horrifically slow. An 8MB
    file takes about 25s to read. With the 4k parameters that goes down to
    about 8.6s (on an unloaded ethernet). I get these bad speeds with both
    3c509 and 3c590. Note that our NetworkAppliance fileserver uses 4k
    blocks, so this might be a factor. Maybe this should be a separate
    thread. Should I expect decent NFS performance with NFS 1k?

    OK. If I mount NFS with the default 1k packet sizes, Linux SMP does not
    lock up on me!!! This sounds like a big clue to the problem.

    So, could some of you out there try my crash method (pulling the
    ethernet wire during a big NFS read) after mounting with rsize=4096 and
    wsize=4096? I'll bet you'll lock up Linux SMP!

    Lee Hetherington
    ilh@lcs.mit.edu

    \
     
     \ /
      Last update: 2005-03-22 13:37    [W:0.022 / U:64.516 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site