From: Stefan Hajnoczi <stefanha@gmail.com>
To: Kevin Wolf <kwolf@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>,
Avi Kivity <avi@redhat.com>,
qemu-devel@nongnu.org,
Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v5 2/4] virtio-pci: Use ioeventfd for virtqueue notify
Date: Tue, 25 Jan 2011 09:54:00 +0000 [thread overview]
Message-ID: <AANLkTimMP82vg368tQBpKt-nVjMvmNqDCKu9d2xtESeu@mail.gmail.com> (raw)
In-Reply-To: <AANLkTi=b6qMRNk9FveYhGviRXyOXBVu9kpZ2wuBTgfpn@mail.gmail.com>
On Tue, Jan 25, 2011 at 9:49 AM, Stefan Hajnoczi <stefanha@gmail.com> wrote:
> If any other vcpu interruption makes virtio-ioeventfd chug along then
> why are you seeing 100% CPU livelock? My theory is that dynticks has
> a race condition which causes timers to stop working in QEMU.
I forgot to mention that you can test this theory by building without
I/O thread and running with -clock hpet.
If the guest no longer hangs, then this suggests you're seeing the
dynticks race condition.
Stefan
next prev parent reply other threads:[~2011-01-25 9:54 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-12 15:02 [Qemu-devel] [PATCH v5 0/4] virtio: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-12-12 15:02 ` [Qemu-devel] [PATCH v5 1/4] virtio-pci: Rename bugs field to flags Stefan Hajnoczi
2010-12-12 15:02 ` [Qemu-devel] [PATCH v5 2/4] virtio-pci: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2011-01-24 18:54 ` Kevin Wolf
2011-01-24 19:36 ` Michael S. Tsirkin
2011-01-24 19:48 ` Kevin Wolf
2011-01-24 19:47 ` Michael S. Tsirkin
2011-01-24 20:05 ` Kevin Wolf
2011-01-25 7:12 ` Stefan Hajnoczi
2011-01-25 9:49 ` Stefan Hajnoczi
2011-01-25 9:54 ` Stefan Hajnoczi [this message]
2011-01-25 11:27 ` Michael S. Tsirkin
2011-01-25 13:20 ` Stefan Hajnoczi
2011-01-25 14:07 ` Stefan Hajnoczi
2011-01-25 19:18 ` Anthony Liguori
2011-01-25 19:45 ` Stefan Hajnoczi
2011-01-25 19:51 ` Anthony Liguori
2011-01-25 19:59 ` Stefan Hajnoczi
2011-01-26 0:18 ` Anthony Liguori
2010-12-12 15:02 ` [Qemu-devel] [PATCH v5 3/4] virtio-pci: Don't use ioeventfd on old kernels Stefan Hajnoczi
2010-12-12 15:02 ` [Qemu-devel] [PATCH v5 4/4] docs: Document virtio PCI -device ioeventfd=on|off Stefan Hajnoczi
2010-12-12 15:14 ` [Qemu-devel] Re: [PATCH v5 0/4] virtio: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-12-12 20:41 ` Michael S. Tsirkin
2010-12-12 20:42 ` Michael S. Tsirkin
2010-12-12 20:56 ` Michael S. Tsirkin
2010-12-12 21:09 ` Michael S. Tsirkin
2010-12-13 10:24 ` Stefan Hajnoczi
2010-12-13 10:38 ` Michael S. Tsirkin
2010-12-13 13:11 ` Stefan Hajnoczi
2010-12-13 13:35 ` Michael S. Tsirkin
2010-12-13 13:36 ` Michael S. Tsirkin
2010-12-13 14:06 ` Stefan Hajnoczi
2010-12-13 15:27 ` Stefan Hajnoczi
2010-12-13 16:00 ` Michael S. Tsirkin
2010-12-13 16:29 ` Stefan Hajnoczi
2010-12-13 16:30 ` Michael S. Tsirkin
2010-12-13 16:12 ` Michael S. Tsirkin
2010-12-13 16:28 ` Stefan Hajnoczi
2010-12-13 17:57 ` Stefan Hajnoczi
2010-12-13 18:52 ` Michael S. Tsirkin
2010-12-15 11:42 ` Stefan Hajnoczi
2010-12-15 11:48 ` Stefan Hajnoczi
2010-12-15 12:00 ` Michael S. Tsirkin
2010-12-15 12:14 ` Michael S. Tsirkin
2010-12-15 12:59 ` Stefan Hajnoczi
2010-12-16 16:40 ` Stefan Hajnoczi
2010-12-16 23:39 ` Michael S. Tsirkin
2010-12-19 14:49 ` Michael S. Tsirkin
2011-01-06 16:41 ` Stefan Hajnoczi
2011-01-06 17:04 ` Michael S. Tsirkin
2011-01-06 18:00 ` Michael S. Tsirkin
2011-01-07 8:56 ` Stefan Hajnoczi
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