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From: Florian Weimer <fweimer@redhat.com>
To: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Cc: Zack Weinberg <zackw@panix.com>,  Christian Brauner <christian@brauner.io>,  nd <nd@arm.com>,  GNU C Library <libc-alpha@sourceware.org>
Subject: Re: Fwd: What can a signal handler do with SIGSTKSZ?
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Date: Mon, 14 Jan 2019 17:18:15 +0100
In-Reply-To: <61925098-4669-b478-9baf-644818d26a44@arm.com> (Szabolcs Nagy's
	message of "Mon, 14 Jan 2019 11:18:41 +0000")
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* Szabolcs Nagy:

> i think proposing sysconf(_SC_{MIN}SIGSTKSZ) for posix is the
> right solution with the kernel providing an upper bound of the
> stack frame in AT_MINSIGSTKSZ (as it already does on aarch64).

It's still a bit nasty for process migration, but at least it should for
VM migration.  I think that would be a reasonable compromise.

Of course, we'd still need a way to determine how much we should add on
top of AT_MINSIGSTKSZ for the application developer's benefit. 8-)

Thanks,
Florian