speed improvement with kernel 4.2.5 / 4.3.3 / 4.6.6

[uelpenich]

I upgraded my NWSP2s, works as expected.

[fvdw]

Thx for this feedback.
Today I encountered one bug in the kernel.
The function to use backside usb port (device mode) will not work, need to make corrections in creating the proc to make the switch possible.
Any command trying to read /proc/usbconf will create a segmentation fault. Normally no command uses that but a general ccommand like "find" set to search all directories will fail and abort with a seg fault when it tries to read this directory

[andjohn]

Hey FVDW,
I'm having an issue that I'm not sure is the new kernel's fault. I'll be doing some more tests, but I'm getting a billion of these errors in dmesg:

mv643xx_eth_port mv643xx_eth_port.0 eth0: failed to linearize skb with tiny unaligned fragment.

Any thoughts?

[fvdw]

which nas?

means your network device is busy when trying to transmit data, (network problem ?)

I did not see them until now

[andjohn]

It's on my Big5Network2 running this 4.2.5 kernel and 16.1 all patched up. I'll update it if I have this problem in the future, I was dumping some files to my NAS when it happened.

[fvdw]

:scratch I also have 5big2, but not problems so far

[uelpenich]

I upgraded my NWSP2s, works as expected.

After some days I discovered odd things:
* reading files from a share (smb protocol) delivered uncomplete files (checksum errors while unzippung the copied file).
* rsync restore (nwsp2 => 2big2) delivered lots of warning messages like this

WARNING: Pfarrbrief/Pfarrbrief 2014-09/Kinderchor/101OLYMP/P9060020.JPG failed verification -- update discarded (will try again).

and an unexpected break after some 19,000 lines:

unexpected tag 66 [receiver]
rsync error: error in rsync protocol data stream (code 12) at io.c(1141) [receiver=3.0.9]
rsync: connection unexpectedly closed (1345 bytes received so far) [generator]
rsync error: error in rsync protocol data stream (code 12) at io.c(605) [generator=3.0.9]

After restoring the 3.14.2 kernel the rsync restore went well (30502 files).

[fvdw]

Then this kernel will be dumped, as this is second case were the kernel seems to give errors. Seems the higher speed causes transmission problems. I will compile another one more recent version to see if the issue are fixed

I doubt if this is really a kernel issue, it could be also a cable issue, but because reverting to 3.14.2 eliminated the errors on the nas of Uelpenich it is safer for the moment to try a newer kernel

[andjohn]

Hey FVDW,
Is there any place where I can get the old kernel to re-flash? I'm looking forward to your newer kernel too :)

[fvdw]

no problem, the latest 3.14.2 kirkwood attached