This repository was archived by the owner on May 12, 2021. It is now read-only.
This repository was archived by the owner on May 12, 2021. It is now read-only.
Support Epoll on Arm64 #240
Description
Description of problem
sudo docker run -ti --runtime kata-runtime busybox sh
Expected result
run successfully
Actual result
log info from qemu output:
announce: name="kata-agent",pid='\x01',source="agent",version="0.0.1-8856b3acb43a90fe30f120b3e083807720829e4f",device-handlers="scsi,blk",storage-handlers="scsi,9p,blk",system-memory="2054184 kB"
announce: name="kata-agent",pid='\x01',source="agent",version="0.0.1-8856b3acb43a90fe30f120b3e083807720829e4f",device-handlers="blk,scsi",storage-handlers="9p,blk,scsi",system-memory="2054184 kB"
time="2018-05-10T07:26:31.52054312Z" level=info msg="agent grpc server starts" name=kata-agent pid=1 source=agent
init[332]: syscall 1069
Code: f94023e4 f94027e5 f9400fe8 d4000001 (b13ffc1f)
CPU: 0 PID: 332 Comm: init Not tainted 4.9.51-hyper #1
Hardware name: linux,dummy-virt (DT)
task: ffffffc008c20100 task.stack: ffffffc008cc8000
PC is at 0x473cf8
LR is at 0x473cd8
pc : [<0000000000473cf8>] lr : [<0000000000473cd8>] pstate: 20000000
sp : 0000004420041df0
x29: 0000007f7fffe950 x28: 0000004420001b00
x27: 0000000000de9880 x26: 0000004420041e00
x25: 00000000008abcf8 x24: 0000007f8e2d8000
x23: 0000007f8e2dc000 x22: 0000007f7ffff8d0
x21: 000000000000005a x20: 0000000000000000
x19: 000000000000003c x18: 0000000000000000
x17: 0000004420041e90 x16: 0000004420041e08
x15: 0000000000000e10 x14: 0000000000000008
x13: 000000441fffdbcb x12: 0000000000000000
x11: 0000000000000000 x10: 00000000000000f3
x9 : 0000004420048690 x8 : 000000000000042d
x7 : 0000000000000030 x6 : 0000000000000001
x5 : 0000000000000000 x4 : 0000000000000000
x3 : ffffffffffffffff x2 : 0000000000000001
x1 : 0000004420041ee0 x0 : 0000000000000006
time="2018-05-10T07:26:31.535166056Z" level=warning msg="Failed to wait agent grpc channel ready" error="function not implemented" name=kata-agent pid=1 source=agent
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
Causes
The syscall 1069 is relevant with func syscall.EpollWait. epoll_wait is deprecated according to a slideshow by Linaro who ported Linux to ARM64, and only the newer epoll_pwait is provided on Linux/arm64. Golang has already fixed relevant issue. However, Implementation for EpollWait on Arm64 exits in x/sys/unix, not in the standard Go syscall package.I will pull relevant request asap.