From: Alex Williamson <alex.williamson@redhat.com>
To: qemu-devel@nongnu.org, me@clifhouck.com
Cc: Bug 1580459 <1580459@bugs.launchpad.net>
Subject: Re: [Qemu-devel] [Bug 1580459] Re: Windows (10?) guest freezes entire host on shutdown if using PCI passthrough
Date: Thu, 7 Jul 2016 15:03:16 -0600 [thread overview]
Message-ID: <20160707150316.0a715b82@t450s.home> (raw)
In-Reply-To: <20160707203415.17948.81896.malone@wampee.canonical.com>
On Thu, 07 Jul 2016 20:34:15 -0000
Clif Houck <me@clifhouck.com> wrote:
> I was also experiencing the host hard locking when shutting down a
> Windows 10 guest with a Nvidia GPU passed-through, but the issue appears
> to be completely solved after switching the card to MSI mode in the
> Windows guest.
>
> However, I would be interested in understanding *why* using the card in
> line-interrupt mode in the guest causes the host to lockup when the
> guest relinquishes control of the device. Is it a bug in qemu or vfio,
> or even the Linux kernel?
>
> I don't know if its relevant, but I've noticed when the card is not
> being used by the guest it is listed as MSI: Enable- by lspci,
> suggesting that vfio is keeping the card in line-interrupt mode when not
> in use.
>
Interrupts are disabled when the card is not in use. Can you test
whether the following commit fixes the problem:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=956b56a984ddf10aa69b25318dc04430101beed6
This was added in v4.7-rc2, so it will also be included in anything
newer. Thanks,
Alex
next prev parent reply other threads:[~2016-07-07 21:03 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-11 6:19 [Qemu-devel] [Bug 1580459] [NEW] Windows (10?) guest freezes entire host on shutdown if using PCI passthrough Jimi
2016-05-19 18:07 ` [Qemu-devel] [Bug 1580459] " kachaffeous
2016-05-19 18:18 ` kachaffeous
2016-05-20 0:11 ` Jimi
2016-05-20 16:43 ` kachaffeous
2016-05-20 16:58 ` Jimi
2016-05-20 16:58 ` Jimi
2016-05-28 16:39 ` Gandalf-The-Red
2016-05-28 17:08 ` Jimi
2016-05-28 17:25 ` Gandalf-The-Red
2016-05-28 18:31 ` Gandalf-The-Red
2016-05-28 19:12 ` Jimi
2016-05-28 19:14 ` Jimi
2016-05-29 1:33 ` Chris McCarron
2016-05-29 1:40 ` Chris McCarron
2016-05-29 1:59 ` Jimi
2016-05-29 17:50 ` Chris McCarron
2016-05-29 17:52 ` Chris McCarron
2016-05-29 17:53 ` Chris McCarron
2016-05-29 17:55 ` Chris McCarron
2016-05-29 17:57 ` Chris McCarron
2016-05-29 18:04 ` Chris McCarron
2016-05-29 18:15 ` Jimi
2016-05-29 18:29 ` Chris McCarron
2016-05-31 6:55 ` James Newman
2016-05-31 7:02 ` James Newman
2016-05-31 7:37 ` Jimi
2016-05-31 23:13 ` Chris McCarron
2016-06-01 1:15 ` Jimi
2016-06-05 23:34 ` jimrif
2016-06-06 0:44 ` Jimi
2016-06-06 5:04 ` jimrif
2016-06-06 5:55 ` Chris McCarron
2016-06-06 8:12 ` Jimi
2016-06-06 22:21 ` Chris McCarron
2016-06-06 22:21 ` Chris McCarron
2016-06-06 22:23 ` Chris McCarron
2016-06-06 23:36 ` James Newman
2016-06-07 1:05 ` Jimi
2016-06-12 9:32 ` Peter Maloney
2016-06-14 19:44 ` Jimi
2016-06-15 14:20 ` kachaffeous
2016-06-23 3:32 ` Jimi
2016-06-23 6:17 ` Jimi
2016-06-23 12:05 ` Chris McCarron
2016-06-23 18:25 ` Jimi
2016-06-24 1:16 ` Chris McCarron
2016-06-25 5:57 ` Jimi
2016-06-25 13:10 ` Chris McCarron
2016-07-07 20:34 ` Clif Houck
2016-07-07 21:03 ` Alex Williamson [this message]
2016-07-07 21:45 ` Jimi
2016-07-07 21:46 ` Jimi
2017-02-25 11:04 ` yanman
2017-12-09 18:44 ` john doe
2017-12-09 20:56 ` Clif Houck
2017-12-09 21:30 ` Jimi
2017-12-18 20:04 ` Benjamin
2021-04-22 5:08 ` Thomas Huth
2021-04-22 10:02 ` Chris McCarron
2021-04-22 12:21 ` Jimi
2021-04-23 4:29 ` Thomas Huth
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