The return of kevent?

Posted May 17, 2007 22:34 UTC (Thu) by slamb (guest, #1070)
In reply to: The return of kevent? by renox
Parent article: The return of kevent?

His strange point about the poll vs read cancellation point, is just the latest example.

I feel some sympathy for Ulrich there. You have to realize that thread cancellation is a rather poorly-described idea that the standards people said in a hand-wavy way was mandatory long before anyone had a working implementation. People like Ulrich are stuck working out the details of an actual working system, and traffic on the mailing lists shows that he's put a lot of effort into it. I don't think his approach is right - he basically just enables async cancels around every cancellation point, where a sigsafe-like way would make it possible to honor the cancellation if and only if the system call has not yet returned - but it's not for lack of trying.