Re: [Xen-devel] xen+drbd (partial?) success story

[Jérôme Petazzoni <jp@xxxxxxxx>]

> > Badness in blk_plug_device at drivers/block/ll_rw_blk.c:1217
> > [<c02270d0>] blk_plug_device+0x80/0x90
> > [<c7101a27>] drbd_make_request_common+0x727/0x8f0 [drbd]
> >    
> Did you compile the drbd module with ARCH=xen?
>  
That's it  ! Thanks a lot.

I had compiled with Debian's module-assistant and dumbly assumed that it 
would reuse the correct ARCH setting from the specified source tree.
I was wrong, andre-building the module package the correct flags 
(MAKEFLAGS="ARCH=xen") gave me a different module, which worked 
perfectly, without those messages.
By the way, performance of drbd-backed root device in a domU seems now 
equal to performance of raw access in dom0. Great !
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