Re: Back to the future.

From: Linus Torvalds
Date: Fri Apr 27 2007 - 17:45:47 EST

On Fri, 27 Apr 2007, Rafael J. Wysocki wrote:
> Why do you think that keeping the user space frozen after 'snapshot' is a bad
> idea? I think that solves many of the problems you're discussing.

It makes it harder to debug (wouldn't it be *nice* to just ssh in, and do

gdb -p <snapshotter>

when something goes wrong?) but we also *depend* on user space for various
things (the same way we depend on kernel threads, and why it has been such
a total disaster to try to freeze the kernel threads too!). For example,
if you want to do graphical stuff, just using X would be quite nice,
wouldn't it?

But I do agree that doing everythign in the kernel is likely to just be a
hell of a lot simpler for everybody.

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