Sorry for cross-posting - wasn't sure which list would give the best chances. I am forwarding a problem-report, sent yesterday to lkml with a bit more data. Short: 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)). Clients: 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: PC2:2.6.0-test11 2m21s (*) PC2:2.4.20 16.5s SA1100:2.4.19-rmk7 never finishes (*) PXA:2.4.21-rmk1-pxa1 as above PXA:2.6.0-rmk1-pxa as above server: 2.4.21 PC2:2.6.0-test11 6s PC2:2.4.20 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. Here are the results of today with this card: server: 2.6.0 PC2: 2.6.0-test11 9s PC2: 2.4.20 4s SA1100: 2.4.19-rmk7 never finishes server: 2.4.21 SA1100: 2.4.19-rmk7 6s Then I tried PC2 as a server with different kernels PC2: 2.6.0-test11 PC1: 2.6.0 10s SA1100: 2.4.19-rmk7 never finishes server PC2: 2.4.20 PC1: 2.6.0 6s SA1100: 2.4.19-rmk7 7s 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. nfs-utils on both PC1 and PC2 version 1.0.6 (Debian Sarge). Is it fixed somewhere (2.6.1-rcx?), or what should I try / what further information is required? Sorry, I am not subscribed to any of these lists, so, please, CC. Thanks Guennadi --- Guennadi Liakhovetski - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
