Date: Fri, 15 Jul 2022 18:24:36 -0400 From: Mark Johnston <markj@freebsd.org> To: Larry Rosenman <ler@lerctr.org> Cc: Freebsd current <freebsd-current@freebsd.org> Subject: Re: limits.conf/stacksize doesn't seem to work? Message-ID: <YtHpJEzN7OHmvle4@nuc> In-Reply-To: <32dc6f5b56a749f9b8e26330f9f2e8e0@lerctr.org> References: <d997dadc5e1b09fa6af0419f6641ed7f@lerctr.org> <YtHnsCfIwe%2BK6RMF@nuc> <32dc6f5b56a749f9b8e26330f9f2e8e0@lerctr.org>
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On Fri, Jul 15, 2022 at 05:21:27PM -0500, Larry Rosenman wrote: > On 07/15/2022 5:18 pm, Mark Johnston wrote: > > On Fri, Jul 15, 2022 at 05:04:18PM -0500, Larry Rosenman wrote: > >> I'm using the following kernel config: > >> [...] > >> and the following login.conf: > >> [...] > >> bacula_dir:\ > >> :stacksize-max=68719476736:\ > >> :stacksize-cur=68719476736:\ > >> :tc=daemon: > >> [...] > >> I've updated my (ler) password entry to reference bacula_dir: > >> ler:<elided>:1001:1001:bacula_dir:0:0:Larry > >> Rosenman:/home/ler:/usr/local/bin/zsh > >> > >> > >> when I ssh in, the stacklimit is still: > >> โฏ ulimit -H -s > >> 2097152 > > > > What is the value of the kern.maxssiz sysctl on this system? > > > >> ler in ๐ borg in sys/amd64/conf๐ on ๎ ler/freebsd-main-changes:main on > >> โ๏ธ (us-east-1) > >> โฏ ulimit -S -s > >> 2097152 > >> > >> ler in ๐ borg in sys/amd64/conf๐ on ๎ ler/freebsd-main-changes:main on > >> โ๏ธ (us-east-1) > >> โฏ > >> > >> Where does this number come from? What am I missing here? > > > > The stack limit cannot be set to an arbitrarily large number. It will > > silently be clamped to maxssiz. > > โฏ sysctl kern.maxssiz > kern.maxssiz: 2147483648 Then what you're seeing is expected. The kernel is clamping the stack segment limit to 2GB.
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