kdump fails to save vmcore on azure guest instance type "Standard M416s v2" with sysrq-c command.

Issue

• kdump fails to save vmcore on azure guest instance type "Standard M416s v2" with sysrq-c command.
• Kdump becomes extremely slow and never able to save vmcore when crashed with SysRq-C command.

[    2.117713] systemd[1]: Detected virtualization microsoft.
[    2.121076] systemd[1]: Detected architecture x86-64.
[    2.124188] systemd[1]: Running in initial RAM disk.
[   32.224197] systemd[1]: Set hostname to <hostname>.    <---- [Observe printk time in seconds, just 32 seconds to set hostname]
[   32.440601] systemd[1]: Listening on udev Kernel Socket.
[   62.944215] systemd[1]: Reached target Slices.
[   93.152100] systemd[1]: Reached target Network is Online.
[  123.360161] systemd[1]: Reached target Swap.
[  153.568097] systemd[1]: Reached target Local File Systems.
[  183.776205] systemd[1]: Reached target Initrd Root Device.
[  213.984235] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[  244.192374] systemd[1]: Listening on Journal Socket.
[  274.401458] systemd[1]: Started Hardware RNG Entropy Gatherer Daemon.
[  304.609424] systemd[1]: Started Memstrack Anylazing Service.
[  334.817495] systemd[1]: Starting Load Kernel Modules...
[  334.841439] IPMI message handler: version 39.2
[  334.845834] ipmi device interface
[  365.025151] systemd[1]: Starting Create Volatile Files and Directories...
[  395.233341] systemd[1]: Starting Create Static Device Nodes in /dev...
[  425.440424] systemd[1]: Listening on udev Control Socket.
[  455.648401] systemd[1]: Listening on Journal Socket (/dev/log).
[  485.857217] systemd[1]: Starting Journal Service...
[  516.064156] systemd[1]: Reached target Sockets.
[  636.896195] systemd[1]: Reached target Paths.
[  848.353270] systemd[1]: Starting Setup Virtual Console...   <--- till here kdump almost took more than 10minutes.