[tor-relays] tor enters uninterruptible sleep forever when using transparent proxy

[Zack Weinberg]

On Tue, May 22, 2018 at 8:11 PM, Nicolás Dato <nicolas.dato at gmail.com> wrote:
>> tor enters uninterruptible sleep forever when using transparent proxy
>
> For future references, the issue was the kernel version 4.4.118,
> upgraded and the problem was gone.

A bit of Unix sysadmin lore that isn't as widely advertised as it once
was (because, thankfully, it comes up far less often than it used to):
there are only three reasons why a process would remain in an
uninterruptible sleep for more than a few milliseconds: an abnormally
slow storage peripheral (e.g. a tape drive being rewound, or a hard
drive that's about to fail), a network file server that isn't
responding to messages, or a kernel bug.

zw