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| From | David Vrabel <david.vrabel@citrix.com> |
| Newsgroups | linux.kernel |
| Subject | Re: [Xen-devel] [PATCH] xen: Remove event channel notification through Xen PCI platform device |
| Date | Fri, 30 Sep 2016 16:50:01 +0200 |
| Message-ID | <sn7ip-31c-1@gated-at.bofh.it> (permalink) |
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| X-Original-Cc | Juergen Gross <jgross@suse.com>, Ross Lagerwall <ross.lagerwall@citrix.com>, <linux-pci@vger.kernel.org>, <x86@kernel.org>, Paul Gortmaker <paul.gortmaker@windriver.com>, Julien Grall <julien.grall@citrix.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, "Ingo Molnar" <mingo@redhat.com>, David Vrabel <david.vrabel@citrix.com>, "Anthony Liguori" <aliguori@amazon.com>, "H. Peter Anvin" <hpa@zytor.com>, "Bjorn Helgaas" <bhelgaas@google.com>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Thomas Gleixner <tglx@linutronix.de>, Stefano Stabellini <stefano.stabellini@eu.citrix.com> |
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On 26/08/16 22:55, KarimAllah Ahmed wrote:
> Ever since commit 254d1a3f02eb ("xen/pv-on-hvm kexec: shutdown watches
> from old kernel") using the INTx interrupt from Xen PCI platform device for
> event channel notification would just lockup the guest during bootup.
> postcore_initcall now calls xs_reset_watches which will eventually try to read
> a value from XenStore and will get stuck on read_reply at XenBus forever since
> the platform driver is not probed yet and its INTx interrupt handler is not
> registered yet. That means that the guest can not be notified at this moment of
> any pending event channels and none of the per-event handlers will ever be
> invoked (including the XenStore one) and the reply will never be picked up by
> the kernel.
Applied to for-linus-4.9, thanks.
David
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Re: [Xen-devel] [PATCH] xen: Remove event channel notification through Xen PCI platform device David Vrabel <david.vrabel@citrix.com> - 2016-09-30 16:50 +0200
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