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Date: Fri, 07 Dec 2018 21:06:18 +0100
From: Florian Weimer <>
To: Rich Felker <>
Subject: Re: aio_cancel segmentation fault for in progress write requests

* Rich Felker:

> I don't think so. I'm concerned that it's a stack overflow, and that
> somehow the kernel folks have managed to break the MINSIGSTKSZ ABI.



It's a nasty CPU backwards compatibility problem.  Some of the
suggestions I made to work around this are simply wrong; don't take them
too seriously.

Nowadays, the kernel has a way to disable the %zmm registers, but it
unfortunately does not reduce the save area size.


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