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[Qemu-devel] [Bug 1469946] Re: guest can't get IP when create guest with
From: |
chao zhou |
Subject: |
[Qemu-devel] [Bug 1469946] Re: guest can't get IP when create guest with bridge. |
Date: |
Tue, 30 Jun 2015 03:41:13 -0000 |
the first bad commit is
commit a90a7425cf592a3afeff3eaf32f543b83050ee5c
Author: Fam Zheng <address@hidden>
Date: Thu Jun 4 14:45:17 2015 +0800
tap: Drop tap_can_send
This callback is called by main loop before polling s->fd, if it returns
false, the fd will not be polled in this iteration.
This is redundant with checks inside read callback. After this patch,
the data will be sent to peer when it arrives. If the device can't
receive, it will be queued to incoming_queue, and when the device status
changes, this queue will be flushed.
Signed-off-by: Fam Zheng <address@hidden>
Message-id: address@hidden
Signed-off-by: Stefan Hajnoczi <address@hidden>
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https://bugs.launchpad.net/bugs/1469946
Title:
guest can't get IP when create guest with bridge.
Status in QEMU:
New
Bug description:
Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32e
Guest OS Type (Linux/Windows):linux
kvm.git Commit:aefbef10e3ae6e2c6e3c54f906f10b34c73a2c66
qemu.git Commit:dc1e1350f8061021df765b396295329797d66933
Host Kernel Version:4.1.0
Hardware:Ivytown_EP, Haswell_EP
Bug detailed description:
--------------------------
when create guest with bridge, the guest can not get ip.
note:
1. fail rate: 3/5
2. this is a qemu bug:
kvm + qemu = result
aefbef10 + dc1e1350 = bad
aefbef10 + a4ef02fd = good
Reproduce steps:
----------------
1. create guest:
qemu-system-x86_64 -enable-kvm -m 2G -smp 4 -device
virtio-net-pci,netdev=net0,mac=$random_mac -netdev
tap,id=net0,script=/etc/kvm/qemu-ifup rhel6u5.qcow
Current result:
----------------
guest can't get IP
Expected result:
----------------
guest can get ip
Basic root-causing log:
----------------------
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