[Bug 260406] pfctl: Cannot allocate memory (after a time)

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 23 Dec 2021 14:29:58 UTC

--- Comment #27 from Kristof Provost <kp@freebsd.org> ---
Summarising some private debugging:

The "pfctl: Cannot allocate memory." originates in a failed uma_zalloc() in
pfr_create_kentry() on the V_pf_kentry_z ("pf table entries") zone. Confirmed
by dtrace (which also shows unexplained issues, with some probes not firing
when they should).

There's no obvious reason why this allocation should fail. There's sufficient
free memory and we're far away from the configured limit. The current suspicion
is a platform specific (this appears to only manifest on arm64) allocator
issue, but combined with the dtrace issues it's hard to say.

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