On 23:32 Fri 05 Oct, Reyk Floeter wrote: > Hi, > > it sometimes happens that a VM is stuck in a reboot loop. This isn't > very pleasent for vmd, so this diff attempts to introduce a hard > rate-limit: if the VM rebooted after less than VM_START_RATE_SEC (6) > seconds, increment a counter. If this happens VM_START_RATE_LIMIT (3) > times in a row, stop the VM. > > The idea is that it might be desirable in some cases to reboot quickly > (you're either really fast on the boot prompt, or you use something > like grub that can automatically reboot into a previous kernel). But > if this happens too often (more than 3 times), something is wrong and > cannot be intended, not even in the worst Linux/grub/unikernel/... > situation. > > These limits are a guessed default. > > Test case: I dd'ed random bytes to a kernel after some initial bytes, > keeping the original size of the kernel. The boot loader loads the > header, the complete kernel, tries to boot it and *boom*, reset ;) > > Comments? Concerns? Better ideas? OKs? > > Reyk
At least there should be an easy way to enable/disable this at will. This can be troublesome when someone is trying to fix early not-so-obvious Linux kernel / initrd bugs. Or when testing new kernel code that sometimes results in a panic.
