[Bug 261181] 13-STABLE hang: swap_pager: indefinite wait buffer

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 23 Feb 2023 16:37:10 UTC

Jim Pirzyk <pirzyk@FreeBSD.org> changed:

           What    |Removed                     |Added
                 CC|                            |pirzyk@FreeBSD.org

--- Comment #16 from Jim Pirzyk <pirzyk@FreeBSD.org> ---
So I am seeing this also on a Virtual Machine since I upgraded to 13.1 (from
12.3 I believe).  It happens mostly when the machine is under load for some
reason (backups is a common culprit but not always).  I will note the machine
is starved of memory (2GB) and is swapping most of the time, to an encrypted
partition using GBE.  ZFS is not involved in swap (but is for the filesystem).

A hard reset brings the machine back to life for several hours to multiple
days.  Very random.  Have not yet found steps to force it to happen.

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