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Re: [Xen-devel] IRQs, move_in_progress, -EBUSY &c

To: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] IRQs, move_in_progress, -EBUSY &c
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Wed, 11 Aug 2010 08:38:14 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
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 On 08/11/2010 07:56 AM, George Dunlap wrote:
Going backwards to the root of the problem: The root device times out
even though the device driver successfully loads and sees the device
-- it complains about missing interrupts.  It misses interrupts
because the PHYSDEVOP_setup_gsi returns -16, EBUSY, and the pvops
kernel doesn't retry; so the gsi is never set up.

Aside from any of the other issues, EBUSY doesn't generally suggest that the caller should try again. That would be EAGAIN.


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