I'm using a 2.4.20 kernel (PPC).
When I run multiple 'ping -f' directed to my board
during the kernel boots, sometimes it hangs with
the following messages:
Memory BAT mapping: BAT2=64Mb, BAT3=32Mb, residual: 84Mb
Linux version 2.4.20-rthal5 (ru at styx) (gcc version 2.95.3 20010111
(prerelease/franzo/20010111))
#9 Tue Jan 11 17:09:22 CET 2005
On node 0 totalpages: 29859
zone(0): 29859 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: bootdev=aps0
ip=218.1.36.70:218.1.36.47:218.1.36.254:255.255.255.0::eth0:off
panic=1 mem=119436k
Calibrating delay loop... 194.15 BogoMIPS
...
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache ha
^^^^^^^
the kernel boot hangs here
I have checked this with the BDI2000 and found that the
kernel loops anywhere inside ip_route_input().
I think this is because the ethernet driver (fcc_enet.c)
enables the hardware too already inside it's init routine (fec_enet_init()).
In this way, frames may be received and forwarded to the upper
layers with netif_rx(), before the TCP/IP was initialized.
I suggest to delay the lines
/* Enable transmit/receive */
fccp->fcc_gfmr |= FCC_GFMR_ENR | FCC_GFMR_ENT;
to the open entry point (fcc_enet_open()), which is
triggered by 'ifconfig up' in the following way:
if(!((fccp->fcc_gfmr) & FCC_GFMR_ENR))
fccp->fcc_gfmr |= (FCC_GFMR_ENR | FCC_GFMR_ENT);
By the way, fcc_enet_close() does _NOT_ stop the hardware.
Hopefully, this is not a real problem.
Steffen
--
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Steffen Rumler
ICN CP D NT SW 3
Siemens AG
Hofmannstr. 51 Email: Steffen.Rumler at siemens.com
D-81359 Munich Phone: +49 89 722-44061
Germany Fax : +49 89 722-36703
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