* 802.15.4 6LoWPAN fragmentation is broken
@ 2015-01-13 11:20 Alexander Aring
2015-01-14 14:16 ` Alexander Aring
0 siblings, 1 reply; 2+ messages in thread
From: Alexander Aring @ 2015-01-13 11:20 UTC (permalink / raw)
To: linux-wpan
Hi,
I notice some issue with fragmentation code.
There is some magic number like:
ping6 2001::1 -s 2145
with a payload of 2144 it works. It seems that all payloads above
2144 are broken. I will try to bisect this issue. I see this issue also
in net-next. I suppose it's something with the inet_frag API.
... so don't worry I already working on it.
- Alex
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: 802.15.4 6LoWPAN fragmentation is broken
2015-01-13 11:20 802.15.4 6LoWPAN fragmentation is broken Alexander Aring
@ 2015-01-14 14:16 ` Alexander Aring
0 siblings, 0 replies; 2+ messages in thread
From: Alexander Aring @ 2015-01-14 14:16 UTC (permalink / raw)
To: linux-wpan
Hi,
On Tue, Jan 13, 2015 at 12:20:16PM +0100, Alexander Aring wrote:
> Hi,
>
> I notice some issue with fragmentation code.
>
> There is some magic number like:
>
> ping6 2001::1 -s 2145
>
> with a payload of 2144 it works. It seems that all payloads above
> 2144 are broken. I will try to bisect this issue. I see this issue also
> in net-next. I suppose it's something with the inet_frag API.
>
>
> ... so don't worry I already working on it.
>
Status update to this:
I detected that systemd changed the default net scheduler to fq_codel. [0]
With fq_codel seems that 6LoWPAN fragmentation is broken.
For now: please don't use this scheduler. I will try to find out why we have
fragmentation issues with fq_codel.
- Alex
[0] http://cgit.freedesktop.org/systemd/systemd/commit/?id=e6c253e363dee77ef7e5c5f44c4ca55cded3fd47
^ permalink raw reply [flat|nested] 2+ messages in thread
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