Re: Anyone recall the dreaded tstile issue?

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Tue, 19 Jul 2022 19:15:54 +0000
> From: Emmanuel Dreyfus <manu%netbsd.org@localhost>
> 
> On Tue, Jul 19, 2022 at 01:40:34PM -0400, Mouse wrote:
> > I have found enough time to have a quick look at the code, and I've
> > found a code path that looks like what I was looking for: something
> > that blocks until a git subprocess finishes without handling filesystem
> > requests in the meantime.  I'll need to reorganize the code a little to
> > fix that.
> 
> Doesn't thie problem need a deeper fix? It is annoying that a poorly
> programmed userland process can kill the system.

This is why userspace file systems can be risky, even if convenient or
safer in certain dimensions.  Comprehensively eliminating all the
potential deadlocks is difficult.