Version: (using KDE KDE 3.4.1) Installed from: Gentoo Packages Compiler: gcc 3.4.4 OS: Linux If I use nfs:// to browse a TCP NFS file server, copying files TO the server larger than a certain length fails - it'll definitely happen with > 20k files. Other operations work fine. The server reports: RPC: bad TCP reclen 0x00000f9c (non-terminal) in dmesg. This is because the linux sunrpc implementation is incomplete and cannot handle fragmented sunrpc requests. If you look at the relevant code in net/sunrpc/svcsock.c/svc_tcp_recvfrom() in a recent kernel, you see the following: /* FIXME: technically, a record can be fragmented, * and non-terminal fragments will not have the top * bit set in the fragment length header. * But apparently no known nfs clients send fragmented * records. */ I can't figure out why KDE/glibc's sunrpc client implementation is sending fragmented records and I don't have the time to fix the kernel sunrpc implementation. A simple "fix" would be to disable TCP NFS support from kio_nfs completely, and rely on UDP only (UDP works fine BTW). But obviously this isn't great :( I'm using glibc 2.3.5 BTW.
I'm not familiar with nfs, but it looks like someone simply copied the showmount(8) code from nfs-utils, not the connection code. In mnt_openclnt (conn.c in recent nfs-utils) 2048/1024 bytes for send/receive are used.
This is an old bug, but I can confirm that kio_nfs is a complete failure in TCP-based NFSv4 or NFSv4.1 environments. In addition, enabling Nepomuk services presents a "Documents" entry in Dolphin which seems to rely on kio_nfs udp so it is now worthless with the following errors in .xsession-errors: mount clntudp_create: RPC: Port mapper failure - RPC: Unable to receive kio_nfs(3981)/kio (kioslave) KIO::SlaveBase::error: error() called twice! Please fix the KIO slave.
Guess this bug still exists, on my NFS client machines, programs (like Okular, Dolphin and so on) are freezing (from time to time) for some minutes until I can go on to use them. I just compiled a little example from the kde.org page what only opens a file - even that is freezing.
Bug reported a long time ago, not sure whether the kernel has been fixed in the meantime but the quoted comment is no longer present. Please test with an up to date setup if possible.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!