[Bug 281560] gve (4) uma deadlock during high tcp throughput
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Date: Fri, 20 Sep 2024 15:41:42 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=281560
Andrew Gallatin <gallatin@FreeBSD.org> changed:
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CC| |gallatin@FreeBSD.org
--- Comment #5 from Andrew Gallatin <gallatin@FreeBSD.org> ---
(In reply to Mark Johnston from comment #4)
To expand on this, the pattern of stack traces look very much like a degenerate
behavior in the UMA memory allocator when the per-cpu caches are empty, and the
allocation must go back to the zone, and you wind up taking a lock on every
allocation.
I'd check to see if there is a mbuf leak. The output of vmstat -z would be
helpful here.
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