[Bug 275436] tmpfs does not honor memory limits on writes

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 275436] tmpfs does not honor memory limits on writes"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 11 Dec 2023 05:50:43 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275436

--- Comment #11 from Konstantin Belousov <kib@FreeBSD.org> ---
So what would happen if swap is added or removed?

This cannot handle situation when a program allocates anon memory.  And by
default we do not enforce any limits on anon memory use (swap accounting).
We do not even disable overcommit.

I do not object (strongly) against the patch, but for me the introduced
restriction looks very arbitrary.  I might go as far as to propose to add
a verbosity to kernel to announce this limit in
tmpfs_set_reserve_from_percent().

If you intend to commit the patch, please put it on phab, I have several
trivial notes about code.

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