[TUHS] signals and blocked in I/O

Dave Horsfall dave at horsfall.org
Sat Dec 2 09:21:23 AEST 2017


On Fri, 1 Dec 2017, Chris Torek wrote:

[...]

> This part is natural, since signal delivery means "run a function in 
> user space, with user privileges". If you're currently *in* the kernel 
> on behalf of some user process, that means you have to get *out* of it 
> in that same process.

Which leads to the classic comment (it's right up there with the famous 
"line 2238") along the lines of "we ask a process to do something to 
itself".

-- 
Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."


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