[openib-general] slab error while removing ib_mad

[Tziporet Koren]

Or Gerlitz wrote:
> I am getting the below trace on 2.6.17-rc2 / AMD x86_64 / PCIX HCA 
> with both the IB sources that come with the kernel and svn trunk 6520.
>
> This happens if i just modprobe -r ib_mthca after fresh reboot, can
> anyone reproduce it on her/his system as well? The module does get 
> modprobed out.
>
> Or.
>
> $ modprobe -r ib_mthca
>
> $ dmesg
>
> slab error in kmem_cache_destroy(): cache `ib_mad': Can't free all objects
>
> Call Trace: <ffffffff8106decf>{kmem_cache_destroy+150}
> 	<ffffffff88094615>{:ib_mad:ib_mad_cleanup_module+25}
> 	<ffffffff810447ef>{sys_delete_module+415} 
> 	<ffffffff8112f0cf>{__up_write+20}
> 	<ffffffff8105ce8b>{sys_munmap+91} 
> 	<ffffffff81009656>{system_call+126}
>
> ib_mad: Failed to destroy ib_mad cache
>
>
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>   
Hi Or,

I tested here on Intel x86_64 systems with kernel from Fedora C4 last 
update (2.6.16-1.2069_FC4) and there was no issue in removing and 
loading ib_mthca. I tested the code in IBED-1.0-rc3.

Tziporet