HFSC warning issue

HFSC warning issue

[François Delawarde]

Hi all,

I'm having the same HFSC issues as described here:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631945

Some user reports that he made it work by reverting this patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=net/sched/sch_hfsc.c;h=47496098d35c2876cd0b5a88e1365922cc369ce9;hp=abd904be428717462395d62adb682023e64e17a5;hb=3b2eb6131e2f6ff646abb0fc69648179b8b70216;hpb=9c01ae58d4fee39e2af5b1379ee5431dd585cf62


Is this the correct solution? Any "clean" patch I could test that would
resolve this issue?

Thanks,
François.

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Re: HFSC warning issue

[Michal Soltys]

W dniu 11.07.2011 11:26, François Delawarde pisze:
> Hi all,
> 
> I'm having the same HFSC issues as described here:
> 
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631945
> 
> Some user reports that he made it work by reverting this patch:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;f=net/sched/sch_hfsc.c;h=47496098d35c2876cd0b5a88e1365922cc369ce9;hp=abd904be428717462395d62adb682023e64e17a5;hb=3b2eb6131e2f6ff646abb0fc69648179b8b70216;hpb=9c01ae58d4fee39e2af5b1379ee5431dd585cf62
> 
> 
> Is this the correct solution? Any "clean" patch I could test that would
> resolve this issue?
> 
> Thanks,
> François.
> 

Hmmm,

This commit in mention is the patch I submitted 
a while ago, namely:

http://kerneltrap.org/mailarchive/linux-netdev/2010/8/30/6284141

Whole rationale and short discussion regarding the 
change is in that thread. 

In a nutshell - it fixed certain scenario which could cause 
bursty traffic, but the change is just a minor adjustment. Let 
me sit a bit on this thing, and why it manages to trigger that 
warning ...

For a quick fix - reverting that commit should be perfectly 
safe - there were no other patches related to this one.

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Re: HFSC warning issue

[Michal Soltys]

Missed explanation behind the change:

http://www.spinics.net/lists/netdev/msg139383.html

Re: HFSC warning issue

[François Delawarde]

Not sure if its relevant but it seems that the ones that reported the
issue either use IFB or IMQ devices.

In my case, I use IMQ.

François.

On Mon, 2011-07-11 at 14:11 +0200, Michal Soltys wrote: 
> Missed explanation behind the change:
> 
> http://www.spinics.net/lists/netdev/msg139383.html
> 
> 
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Re: HFSC warning issue

[Michal Pokrywka]

Through serveral days my friend has done some tests with kernels 2.6.39.x

2.6.39.1, 2.6.39.2 and 2.6.39.3 are still affected.

2.6.39 (debian version 2.6.39-1 from http://snapshot.debian.org/binary/?cat=l)
works for several hours without triggering the bug. If it persist for some hours
more we will bisect 2.6.39 and 2.6.39.1 and try to find the related patch.