Messages in this thread | | | Subject | Re: 2.6.15.1: persistent nasty hang in sync_page killing NFS (ne2k-pci / DP83815-related?), i686/PIII | From | Trond Myklebust <> | Date | Sun, 29 Jan 2006 15:21:15 -0500 |
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On Sun, 2006-01-29 at 19:56 +0000, Nix wrote: > Further info, possibly in support of your suggestion, possibly not: the > problem does *not* occur with NFS-over-TCP. So it's specific to UDP, > this hardware (perhaps motherboard or network card, see the .config > diff), *and* NFS. Other UDP stuff (e.g. DNS) gets through fine in both > directions; NFS works with TCP; and the whole lot worked before the > hardware was changed.
If it works with TCP but not UDP, then the problem is usually either a NIC driver issue, or a lossy network. Comparing with DNS is not really useful, because NFS over UDP uses much larger packet sizes (32k usually) which causes heavy use of fragmentation.
Cheers, Trond
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