Re: cowloop driver

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On Thu, Sep 17, 2009 at 01:34 +0200, H.J. Thomassen wrote:
> Hello Greg - and cc. Denis Kirjanov
> 
> On Wed, Sep 16, 2009 at 03:50:47PM -0700, Greg KH wrote:
> > On Thu, Sep 17, 2009 at 01:16:29AM +0400, Denis Kirjanov <kirjanov@xxxxxxxxx wrote:
> > > Good time of day.
> > > I want to take on work related to the cowloop driver. Anybody else
> > > involved with this?
> > 
> > The original author is, you should also copy him.
> > 
> > Attached is his latest version, if you could turn this into a patch
> > against Linus's latest tree, that would be wonderful.  Unfortunaly, I
> > have to take a last-minute-business trip tomorrow and can't get to it
> > for a few weeks :(
> > 
> > > While loading the module I get an kernel crash. It seems that
> > > something wrong with cowloop kernel thread.
> > 
> > Handrik-Jan, have you heard of this?
> 
> Yes, Denis told me so. He indicated that it was inside a call
> to __blk_end_request_cur() and that's a call that you inserted
> to replace a call to end_request(). From the way you substituted
> these calls I assume that they are drop-in replacements?
> 
> Tomorrow I hope to have a VM running with the newest kernel version
> where I can start testing without porting the driver back to
> end_request() c.s.
> 
> > 
> > Denis, care to post a kernel oops trace?
> 
> Would be most helpful
> 
> -- 
> Hendrik-Jan Thomassen     <hjt@xxxxxxxxxxxxxx>
> AT Computing
> Linux/UNIXperts,
> opleiders & oplossers     Tel +31 24 352 72 82
> Toernooiveld 104          Tel cursussecretariaat: +31 24 352 72 72
> 6525 EC  Nijmegen         Fax +31 24 352 72 92
> Postbus 1428              info@xxxxxxxxxxxxxx
> 6501 BK  Nijmegen         www.atcomputing.nl
> 
> 'If you think education is expensive, then try ignorance.'

It looks strange, but I succesfully load cowloop on the same kernel under qemu.
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