I use a dockapp called 'wmnet' [1] to monitor the speed of
my internet connection and after the kernel v3.18 it does no
longer work properly (it still doesn't work in v3.19-rc3)
I bisected the problem and the culprit is this commit:
commit 6e094bd805a9b6ad2f5421125db8f604a166616c
Author: Rafał Miłecki <zaj...@gmail.com>
Date: Fri Sep 5 00:18:48 2014 +0200
bcma: move code for core registration into separate function
This cleans code a bit and will us to register cores in other places as
well. The only difference with this patch is using "core_index" for
setting device name.
The problem is caused by the different name that my wireless connection
receives after this patch:
wlp3s0b1 (after the patch)
wlp3s0 (before the patch)
because it affects the display of information in the file /proc/net/dev.
Before the patch the fields are all aligned:
[mafra@linux-g29b:wmnet]$ cat net_dev_good.txt
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes
packets errs drop fifo colls carrier compressed
lo: 35916 332 0 0 0 0 0 0 35916
332 0 0 0 0 0 0
wlp3s0: 6406428 5794 0 0 0 0 0 0 426813
3778 0 0 0 0 0 0
but after the patch the fields are misaligned:
[mafra@linux-g29b:wmnet]$ cat net_dev_bad.txt
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes
packets errs drop fifo colls carrier compressed
lo: 600 8 0 0 0 0 0 0 600
8 0 0 0 0 0 0
wlp3s0b1: 9266848 7298 0 0 0 0 0 0 372229
4030 0 0 0 0 0 0
And for some reason this change confuses 'wmnet'. Reading the source code
of 'wmnet' I found that it reads the packets as follows,
totalpackets_in = strtoul(&buffer[15], NULL, 10);
I am not sure if 'wmnet' could do this better (any suggestions?),
but the fact is that it was working before and now it is not.
Any help is greatly appreciated.
[1] wmnet can be found in http://repo.or.cz/w/dockapps.git
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