https://bugs.kde.org/show_bug.cgi?id=374940

--- Comment #6 from Julian Seward <jsew...@acm.org> ---
(In reply to Matthias Urlichs from comment #4)
> * the kernel needs to handle negative %esp offsets all the time because when
> you grow the stack the kernel "sees" the old contents of %esp (necessarily,
> otherwise it couldn't restart the faulting instruction).

Page fault based stack extension only applies to the main thread's stack.

Why does libev have to be non-conforming in this way?  There are plenty of
other packages that do high-performance thread stuff and I've never heard
of any of them doing anything like this.

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