From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?J=E9r=F4me_Petazzoni?= <jp@enix.org>
Subject: Re: xen+drbd (partial?) success story
Date: Thu, 28 Apr 2005 19:23:21 +0200
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Cc: James Bulpin <James.Bulpin@cl.cam.ac.uk>
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>>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 !