[Qemu-devel] DPDK application using vhost-user segfaults when guest is rebooted/shutdown

If a guest has vhost-user enabled, then on reboot vhost_virtqueue_stop is invoked. This unmaps vring memory. However, it will not give any indication to the underlying DPDK application about it. Therefore, a pollmode DPDK driver tries to read the ring to check for packets and segfaults. We do have

[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot

Send VHOST_USER_RESET_OWNER when the device is stopped. Signed-off-by: Shesha Sreenivasamurthy --- hw/virtio/vhost.c | 5 + 1 file changed, 5 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index de29968..808184f 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c

[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot

packets and segfaults. Solution: -- VHOST_USER_RESET_OWNER API is issued by QEMU so that DPDK slave application is informed that mappings will be soon gone so that it can take necessary steps. Shesha Sreenivasamurthy (1): vhost-user: Slave crashes as Master unmaps vrings during guest

[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot

packets and segfaults. Solution: -- VHOST_USER_RESET_OWNER API is issued by QEMU so that DPDK slave application is informed that mappings will be soon gone so that it can take necessary steps. Shesha Sreenivasamurthy (1): vhost-user: Slave crashes as Master unmaps vrings during guest

[Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot

Send VHOST_USER_RESET_OWNER when the device is stopped. Signed-off-by: Shesha Sreenivasamurthy --- hw/virtio/vhost.c | 5 + 1 file changed, 5 insertions(+) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index de29968..808184f 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c

[Qemu-devel] Memcpy behavior inside a VM

Hi, I'm profiling memcpy and seeing strange behavior (for me at least) and wanted to see if some one has an idea what may be happening. My set up is as follows: I have a Ubuntu 12.04 Linux host running 3.2.0-23 kernel. It has a four 10-core dual-hyper-threaded CPU with 128GB RAM. I have instant

[Qemu-devel] Multiple Nics on a VLAN

Hi All, I'm using the following command to have two nics in multicast on the same vlan. I see a storm of ARP requests. Does any one have any suggestions? qemu.bin.kvm84 -hda /live_disks/clone-disk.img -snapshot -serial telnet:SERVER:5,nowait,server -monitor tcp:SERVER:51000,server,nowait,nodel

Re: [Qemu-devel] [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot

:23 AM To: Cisco Employee mailto:she...@cisco.com>> Cc: "qemu-devel@nongnu.org<mailto:qemu-devel@nongnu.org>" mailto:qemu-devel@nongnu.org>> Subject: Re: [PATCH] vhost-user: Slave crashes as Master unmaps vrings during guest reboot On Fri, Jan 15, 2016 at 12:12:43PM -

[Qemu-devel] How to determine Q-id in VHOST_USER_SET_LOG_BASE in a Multi-Q setup ?

Hi All, I'm implementing VM migration support for open-VPP, an open source Vector Packet Processing (VPP) technology (https://wiki.fd.io/view/VPP) - A Linux foundation project. In lieu of it, I have hit an issue and I need some clarification. In Qemu's vhost-user implementation, each queue is t