Messages in this thread | | | From | Bernd Schubert <> | Subject | 2.613: network write socket problems | Date | Mon, 12 Sep 2005 17:39:45 +0200 |
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Hello,
on last Friday we switched on our server to 2.6.13 and today we are experiencing problems with our nfs clients. In particular I'm talking about the unfs3 daemon, not the kernel nfs daemon. Both are running on the server but on different ports, of course. Both are also serving to the same clients, but different directories.
Today it already several times happend that the unfs3 daemon stalled. Ethereal showed no network packages on the unfs3 daemon port during this time. A strace to the proc-id of the daemon clearly shows that *some* writes to some network sockets will take ages to finish
write(37, "\200\0\0x\203\326(\5\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 124) = 124
This kind of writes can take between seconds and minutes, while it usually happens much faster than I can count. After the write() to the network socket, other operations happen rather fast, until the next write to a network socket. (I identified the troublesome filedescriptors by looking to /proc/procid/fd). After restarting the unfs3 daemon everything goes smooth for some time (approximately 20min to 2h), until the next write to a filedescriptor stalls.
Any idea whats going on? Until today this never happend before, neither with 2.6.x nor 2.4.x. As I wrote, on Friday we replaced 2.6.11.12 by 2.6.13, the configuration should be similar, only changes should be HZ set to 250 and additionally the skge driver. We already switched back from skge to sk98lin, but the problem seems to remain.
Thanks, Bernd
-- Bernd Schubert Physikalisch Chemisches Institut / Theoretische Chemie Universität Heidelberg INF 229 69120 Heidelberg e-mail: bernd.schubert@pci.uni-heidelberg.de - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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