Re: [Xen-devel] Debian Kernel: Xen-fb-frontend as a module?

[Ian Campbell <ijc@xxxxxxxxxxxxxx>]

On Tue, 2014-09-23 at 16:43 +0100, David Vrabel wrote:
> On 23/09/14 15:30, Ian Campbell wrote:
> > create !
> > title it "30s delay loading xenfb driver on some systems"
> > owner it Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> > thanks
> > 
> > Hi James,
> > 
> > Some of the other Xen devs were discussing an issue which sounded
> > awfully similar to this one, so I am copying the xen-devel list and
> > creating a Xen bug to track the issue, please CC xen-devel (no need to
> > subscribe but you may be moderated the first time), since the tracker
> > slurps mails from the list.
> > 
> > I'm not sure of the details of the other issue but it involved
> > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b1a3b1c8a8d963424c4699efa64dd8986b2f76d7
> >  hopefully Konrad or one of the others will follow up.
> > 
> > For xen-devel, the first two mails in this thread are
> > https://lists.debian.org/debian-kernel/2014/09/msg00229.html and 
> > https://lists.debian.org/debian-kernel/2014/09/msg00233.html
> 
> The wait stuff for xenbus devices looks like pre-dates distros handling
> asynchronous devices with suitable initrds etc.

Perhaps, but I think most distros still don't use rootwait by default so
unless / turns up reasonably promptly (single digit seconds) the boot
may fail.

> I think we need a command line configurable white list of device types
> to wait for.  The default should be (to match what was done historically):
> 
> PV: vbd, vif, pci, vfb, vkbd.
> HVM: vbd, vif.
> 
> I also think it should be possible to default (via a config option) to
> an empty white list.

Irrespective of the above this seems like a reasonable enough idea to
me.

Ian.


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