[lkml]   [2004]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Subject2.6.0 NFS-server low to 0 performance

    The NFS server on a PC with a 2.6.0 (release) kernel slows down to a crawl
    or stops completely.

    Searched archives - nothing fits exact enough.

    The server (PC1) is a 900MHz Duron with 384M RAM and a tulip 10/100
    (LinkSys) network card (Linksys Network Everywhere Fast Ethernet 10/100
    model NC100 (rev 17)).

    PC2 - Pentium 133MHz with 24M RAM and an onboard Lance 79C970 10mbps
    network card,
    a SA1100 platform (Tuxscreen / Shannon) with 16M RAM, PCMCIA Netgear
    10/100mbps ne2000-compatible (pcnet_cs + 8390) card
    a PXA250 platform (Inphinity / Triton starter-kit) with 64M RAM, onboard
    SMC91C11xFD (smc91x driver) 10/100 chip

    In the tests below I was copying a 4M file from an NFS-mounted
    directory to a RAM-based fs (ramfs / tmpfs). Here are results:

    server with 2.6.0 kernel:

    fast:2.6.0-test11 2m21s (*)
    fast:2.4.20 16.5s
    SA1100:2.4 never finishes (*)
    PXA:2.4.21-rmk1-pxa1 as above
    PXA:2.6.0-rmk1-pxa as above

    server: 2.4.21

    fast:2.6.0-test11 6s
    fast:2.4.20 5s
    SA1100:2.4.19-rmk7 3.22s
    PXA:2.4.21-rmk1-pxa1 7s
    PXA:2.6.0-rmk2-pxa 1) 50s (**)
    (***) 2) 27s (**)

    (*) Messages "NFS server not responding" / "NFS server OK", "mount version
    older than kernel" on mount

    (**) Messages "NFS server not responding" / "NFS server OK", "mount version
    older than kernel" on mount, trafic shows as several peaks

    (***) 2.6.0-rmk2-pxa corresponds to the 2.6.0-rmk2 kernel with a PXA-patch
    forward-ported from diff-2.6.0-test2-rmk1-pxa1.

    The LinkSys card I bought recently, before I used a RTL (3c59x) card, only
    capable of 10mbps, I never saw such problems with it, but I, probably,
    never tried NFS under 2.6.0 with it - have to try too.

    It is not just a problem of 2.6 with those specific network configurations
    - ftp / http / tftp transfers work fine. E.g. wget of the same file on the
    PXA with 2.6.0 from the PC1 with 2.4.21 over http takes about 2s. So, it
    is 2.6 + NFS.

    Is it fixed somewhere (2.6.1-rcx?), or what should I try / what further
    information is required?

    Guennadi Liakhovetski

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 13:59    [W:0.038 / U:30.500 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site