After upgrading to kernel 2.4.28 I noticed that some NFS mounts failed at reboot: * Mounting network filesystems ... [ !! ] mount: RPC: Unable to receive; errno = No route to host which turns out to be a problem with arp: There are two ARP entries for the NFS server. One is correct, and one says "(incomplete)" in the HWaddress column of "arp -v". Strangely this only occured to the second NFS mount entry in /etc/fstab and never to the first (I only have two NFS mounts in /etc/fstab and didn't try it with three or more). When I log in to the NFS client and ping the NFS server the arp-cache gets fixed up and I can mount the NFS filesystem by hand. Reproducible: Sometimes Steps to Reproduce: 1. Build 2.4.28 Kernel 2. Have at least two NFS mounts in /etc/fstab and netmount in default run-level 3. reboot I tried it 10 times and only once the problem didn't occur. Actual Results: With Google I found the same problem upstream on the linux-kernel mailinglist e.g. http://marc.free.net.ph/message/20050113.145029.a63abe83.en.html I will try the proposed patch and report ...
Created attachment 49106 [details, diff] Patch of neighbor.c for hardened-sources-2.4.28-r2
Tried the proposed patch from http://marc.free.net.ph/message/20050113.145029.a63abe83.en.html and couldn't reproduce the problem in three reboots on a machine with hardened-sources-2.4.28-r2 (my diff see Attachement). Will test a gentoo-sources-2.4.28-r5 machine too (it's a rather slow one, so kernel compilation will take some time).
Created attachment 49110 [details, diff] Patch for neighbor.c of gentoo-sources-2.4.28-r5 Tree reboots: No problem seen.
Comment on attachment 49110 [details, diff] Patch for neighbor.c of gentoo-sources-2.4.28-r5 Three reboots: No problem seen.
I have experienced this same problem on hardened-sources. As far as I can tell the patch fixes the problem for me as well. I have added it to the patchset for hardened-sources-2.4.28-r4.
Fixed in 2.4.28-r6; thanks!
