Date: Sat, 16 Apr 2022 10:25:23 +1000 From: Peter Jeremy <peterj@freebsd.org> To: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Can not build kernel on 1GB VM Message-ID: <YloM86%2B8cO7zOGgj@server.rulingia.com> In-Reply-To: <20220415174953.GE13678@post.wayne47.com> References: <20220415174953.GE13678@post.wayne47.com>
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--OqU5eMkTv4ZFksOz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2022-Apr-15 13:49:53 -0400, Michael Wayne <freebsd07@wayne47.com> wrote: >I have a VM with 1GB RAM running FreeBSD 12.1-RELEASE-p3 > >I'm trying to upgrade the machine to 12.3 and having swap failures. Are you using ZFS or UFS and are you swapping to a raw partition or a file/zvol? >the machine ran out of swap. with a bunch of messages like: > Apr 15 12:11:26 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 240593, size: 4096 > Apr 15 12:11:35 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 236224, size: 16384 > Apr 15 12:11:37 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 245, size: 12288 > Apr 15 12:11:46 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 240593, size: 4096 > Apr 15 12:11:55 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 236224, size: 16384 > Apr 15 12:11:57 g1 kernel: swap_pager: indefinite wait buffer: bufobj: = 0, blkno: 245, size: 12288 That message doesn't indicate "out of swap", in indicates that your swap device isn't responding within a "reasonable" time. If you are swapping to a local ZFS file or zvol, you may be running into a known deadlock condition and should switch to using a raw partition for swap. If you can't improve your swap device performance, adjusting the vm.pageout_oom_seq and vm.pfault_oom_attempts sysctls should resolve the problem. A true "out of swap" will appear as a message similar to swap_pager_getswapspace(nnn): failed --=20 Peter Jeremy --OqU5eMkTv4ZFksOz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAmJaDOhfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzQ0nw//XcdDogXlcT4FVCGTCoQV6DXH+sNnKV+O9xii1qmMCaRtDjyssfgU7c9/ p5k5CZK5OpapOxDZJOXN8IXOzBDTAE4sEZ9ZnzJR+RxZFSn2e3pHYqgPBE6X2lHi GilgHz/RWp8QwWS+ydJGBX6xnWF2JlSDERSjNwgg6Bai6guquP5EjVVS5LaY3c+3 Qcctz36KYIv1WyR4FvHp7LAp/UMNCe0Psnjdsi9na3E1uibuvgrwynQIvQ5c1Kjz U1Z8mRg0lD4IMmc29x+UhE4WfUVGfzFnvz0hv5hDoUGmxs3C4unSx9IvGeWBkF8q JRGzM2oHtN8595AM+7tK9zU0sIrDhILJ9iFfYnO4CVQ+lLAptW+ik2qOCU/rWsMm pEWMrpRkSAnntFT+UkElhdpJ/uwSyBUTh/ga5LjZa3SvrsAO/n6GwxGtTjTiHrdW 2OnXaCbq2R5RjdPs4ORjbvH7PEKBi68CFk9vKsHO1+xwVsj2Xt4p6YgwlAiy1eNd Vet4oqrTxjMRrWwEv9BilQ5o2ue6ia8ufR5wUFjldMFYScXvtEf/5BGwlAvk7Wwt myHmkkJ7DIxJ9918k/a0Vr4orXTfuAjk+tEd73GiaT6rKcJGWfN6cFojNGzNN3Np 5BufiX+ZmxO8ugieXd2S04uRdvk9PHNgHiabsBtTB8QOhlhq/PQ= =RhQI -----END PGP SIGNATURE----- --OqU5eMkTv4ZFksOz--
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