On Fri, Jun 10, 2016 at 9:29 PM, Michael Kuriger <[email protected]> wrote:
> Hi Everyone,
> I’ve been running jewel for a while now, with tunables set to hammer.  
> However, I want to test the new features but cannot find a fully compatible 
> Kernel for CentOS 7.  I’ve tried a few of the elrepo kernels - elrepo-kernel 
> 4.6 works perfectly in CentOS 6, but not CentOS 7.  I’ve tried 3.10, 4.3, 
> 4.5, and 4.6.
>
> What does seem to work with the 4.6 kernel is mounting, read/write to a 
> cephfs, and rbd map / mounting works also.  I just can’t do 'rbd ls'
>
> 'rbd ls' does not work with 4.6 kernel but it does work with the stock 3.10 
> kernel.

"rbd ls" operation doesn't depend on the kernel.  What do you mean by
"can't do" - no output at all?

Something similar was reported here [1].  What's the output of "rados
-p <your rbd pool> stat rbd_directory"?

> 'rbd mount' does not work with the stock 3.10 kernel, but works with the 4.6 
> kernel.

Anything in dmesg on 3.10?

[1] https://www.mail-archive.com/[email protected]/msg29515.html

Thanks,

                Ilya
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