Re: Crash in bonding

Re: Crash in bonding

[Or Gerlitz]

Pradeep Satyanarayana wrote:
> This crash was originally reported against Rhel5.4. However, one can recreate this crash quite easily in OFED-1.5 too. 
I understand that you get the crash when working with the RHEL5.4 
bonding driver, correct? does it happen only with IPoIB devices acting 
as the bonding slaves or also with Ethernet devices? Please note that 
with RHEL 5.4 there's no need to use the ofed provided bonding module, 
more over, I believe that the distro provided one is more stable and 
uptodate in this case. Moving forward, ofed bonding support for newish 
distributions is to be removed. Moni, any reason to support bonding/EL 
5.4 in ofed?

Or.

> The steps to recreate the crash are as follows:
> 1. Run traffic (I used ping) on the IB interfaces through the bond master
> 2. ifdown ib0
> 3. ifdown ib1
> 4. modprobe -r ib_ipoib

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Re: Crash in bonding

[Pradeep Satyanarayana]

Or Gerlitz wrote:
> Pradeep Satyanarayana wrote:
>> This crash was originally reported against Rhel5.4. However, one can
>> recreate this crash quite easily in OFED-1.5 too. 
> I understand that you get the crash when working with the RHEL5.4
> bonding driver, correct? 
We used the one that comes native with the Rhel5.4 distro. I also used installed
OFED-1.5 on Rhel5.4 and still see the same problem.

does it happen only with IPoIB devices acting
> as the bonding slaves or also with Ethernet devices? 

I am not exactly sure what you are hinting at. Simplest case is to use IPoIB
devices as slaves and with the steps below the crash occurs. The crash is specific
to IPoIB, and does not happen with Ethernet slaves.

Please note that
> with RHEL 5.4 there's no need to use the ofed provided bonding module,
> more over, I believe that the distro provided one is more stable and
> uptodate in this case. 
We used what is natively available with Rhel5.4.

Moving forward, ofed bonding support for newish
> distributions is to be removed. Moni, any reason to support bonding/EL
> 5.4 in ofed?

Can you explain why you plan to remove this from the newer distros? This is 
indeed news to me.

Pradeep

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Re: Crash in bonding

[Pradeep Satyanarayana]

Shiri Franchi wrote:
> Hi,
> 
> I did it exactly as you described:
> 1. ifdown ib0
> 2. ifdown ib1
> 3. modprobe -r ib_ipoib
> 
> And it did not reproduced..

It is a race that you may not be recreating. I have tried
this across different HCAs and platforms (x86_64, ppc64). 
Seems to recreate almost at will for me.

Pradeep

Re: Crash in bonding

[Or Gerlitz]

Pradeep Satyanarayana wrote:

> The crash is specific to IPoIB, and does not happen with Ethernet slaves.

okay

> Can you explain why you plan to remove this from the newer distros? This is 
> indeed news to me

we plan to remove bonding from --ofed-- as the distro provided bonding supports ipoib, simple as that, what isn't clear here?

Or.
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