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Re: port-xen/50659: Xen4.5 crash with vnds

The following reply was made to PR kern/50659; it has been noted by GNATS.

From: Christoph Badura <>
To: Manuel Bouyer <>
Subject: Re: port-xen/50659: Xen4.5 crash with vnds
Date: Thu, 24 Mar 2016 18:53:20 +0100

 On Wed, Mar 23, 2016 at 09:23:22AM +0100, Manuel Bouyer wrote:
 > I think it is Xen's problem.
 > I noticed that xen 4.5 starts domUs concurently (/etc/rc.d/xendomains start)
 > which prevented be from upgrading to 4.5 because of concurency problems
 > in my network scripts (local change).
 > Now if it runs scripts for each block device (or, I guess, each
 > network device) in parallel, then we have a problem.
 xl does indeed run the device hotplug scripts in parallel.  c.f.
 If you looks at the linux hotplug scripts, they do their own serialization
 as appropriate.  "grep -r _lock hotplug/Linux".
 This is clearly a problem with the NetBSD hotplug scripts.  C.f.  pkg/51008.

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