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x86: 0.934
vnc: 0.761
device: 0.684
kernel: 0.624
KVM: 0.601
PID: 0.547
architecture: 0.535
performance: 0.490
mistranslation: 0.484
semantic: 0.415
network: 0.413
socket: 0.391
peripherals: 0.379
user-level: 0.308
boot: 0.293
virtual: 0.292
ppc: 0.288
graphic: 0.284
register: 0.265
hypervisor: 0.255
files: 0.219
permissions: 0.211
debug: 0.198
VMM: 0.170
risc-v: 0.131
TCG: 0.120
i386: 0.110
arm: 0.078
assembly: 0.073
qemu-bridge-helper failure but qemu not exit
When qemu-bridge-helper run failed, its parent process qemu is still alive.
This is my command line:
qemu-system-x86_64 -curses -enable-kvm -cpu host -smp 4 -m 4096 \
-vnc :1 \
-kernel /data/xugang_vms/boot/vmlinuz \
-initrd /data/xugang_vms/boot/initram \
-append 'module_blacklist=drm,evbug net.ifnames=0 biosdevname=0 ROOTDEV=rootfs' \
-drive file=/data/xugang_vms/instances/vn7/rootfs.img,format=qcow2,if=virtio \
-monitor unix:/data/xugang_vms/var/monitor/vn7.sock,server,nowait \
-netdev bridge,br=vmbr99,helper="/root/bridgehelper --ns=kvm_1 ",id=n1 -device virtio-net,netdev=n1,mac=92:99:98:76:01:07
"/root/bridgehelper" is self defined helper binary by me. But after bridge-helper exited with failure(not send fd to qemu process yet), the linux vm's console will be messed up. I checked the qemu source code(at net/tap.c) and found following snip:
===>
do {
fd = recv_fd(sv[0]);
} while (fd == -1 && errno == EINTR);
saved_errno = errno;
close(sv[0]);
while (waitpid(pid, &status, 0) != pid) {
/* loop */
}
<=========
why recv_fd will infinitely wait for recv? Maybe it shall waitpid and then recv_fd ?
This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:
https://gitlab.com/qemu-project/qemu/-/issues/166
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