Re: osd dies / crahes directly after mkcephfs

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On Fri, 15 Jun 2012, Stefan Priebe wrote:
> Hi,
> 
> i've seen several osd crashes on one of my machines directly after creating
> the ceph fs.
> 
> Attached is the osd log. I also have a core dump file. Do you need it?

Also, are you mounting the ceph file system on the same node as the osd?  
This might be a sync(2)-induced deadlock.

Putting a ceph fs mount on the same node as an osd is dicey in low memory 
situations.  On older glibcs and kernels without syncfs(2) support, it can 
easily deadlock.

sage
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