mirror of https://github.com/xemu-project/xemu.git
7f0bf5ea41
make vm-build-freebsd sometimes fails with "Connection timed out during
banner exchange". The client strace shows:
13:59:30 write(3, "SSH-2.0-OpenSSH_9.3\r\n", 21) = 21
13:59:30 getpid() = 252655
13:59:30 poll([{fd=3, events=POLLIN}], 1, 5000) = 1 ([{fd=3, revents=POLLIN}])
13:59:32 read(3, "S", 1) = 1
13:59:32 poll([{fd=3, events=POLLIN}], 1, 3625) = 1 ([{fd=3, revents=POLLIN}])
13:59:32 read(3, "S", 1) = 1
13:59:32 poll([{fd=3, events=POLLIN}], 1, 3625) = 1 ([{fd=3, revents=POLLIN}])
13:59:32 read(3, "H", 1) = 1
There is a 2s delay during connection, and ConnectTimeout is set to 1.
Raising it makes the issue go away, but we can do better. The server
truss shows:
888: 27.811414714 socket(PF_INET,SOCK_DGRAM|SOCK_CLOEXEC,0) = 5 (0x5)
888: 27.811765030 connect(5,{ AF_INET 10.0.2.3:53 },16) = 0 (0x0)
888: 27.812166941 sendto(5,"\^Z/\^A\0\0\^A\0\0\0\0\0\0\^A2"...,39,0,NULL,0) = 39 (0x27)
888: 29.363970743 poll({ 5/POLLRDNORM },1,5000) = 1 (0x1)
So the delay is due to a DNS query. Disable DNS queries in the server
config.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-ID: <20240206002344.12372-2-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
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| .. | ||
| avocado | ||
| bench | ||
| data | ||
| decode | ||
| docker | ||
| fp | ||
| guest-debug | ||
| image-fuzzer | ||
| include | ||
| keys | ||
| lcitool | ||
| migration | ||
| multiboot | ||
| perf/block/qcow2 | ||
| plugin | ||
| qapi-schema | ||
| qemu-iotests | ||
| qtest | ||
| rocker | ||
| tcg | ||
| tsan | ||
| uefi-test-tools | ||
| unit | ||
| vm | ||
| vmstate-static-checker-data | ||
| Makefile.include | ||
| dbus-vmstate-daemon.sh | ||
| meson.build | ||
| test-qht-par.c | ||
| vhost-user-bridge.c | ||