From: David Vrabel <david.vrabel@citrix.com>
To: KarimAllah Ahmed <karahmed@amazon.de>,
linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
linux-pci@vger.kernel.org, x86@kernel.org,
Julien Grall <julien.grall@citrix.com>,
Ross Lagerwall <ross.lagerwall@citrix.com>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
David Vrabel <david.vrabel@citrix.com>,
Anthony Liguori <aliguori@amazon.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [PATCH] xen: Remove event channel notification through Xen PCI platform device
Date: Fri, 30 Sep 2016 15:46:15 +0100 [thread overview]
Message-ID: <57EE7AB7.4020405__46658.4660615355$1475246847$gmane$org@citrix.com> (raw)
In-Reply-To: <1472248536-2063-1-git-send-email-karahmed@amazon.de>
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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next prev parent reply other threads:[~2016-09-30 14:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-26 21:55 [PATCH] xen: Remove event channel notification through Xen PCI platform device KarimAllah Ahmed
2016-08-26 21:55 ` KarimAllah Ahmed
2016-08-29 17:29 ` Boris Ostrovsky
2016-08-29 17:29 ` Boris Ostrovsky
2016-09-30 14:46 ` David Vrabel [this message]
2016-09-30 14:46 ` [Xen-devel] " David Vrabel
2017-04-10 12:28 ` Raslan, KarimAllah
2017-04-10 12:28 ` [Xen-devel] " Raslan, KarimAllah
2017-04-10 12:28 ` Raslan, KarimAllah
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