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
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Guennadi Liakhovetski
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