Re: Can not build kernel on 1GB VM
- In reply to: Michael Wayne : "Can not build kernel on 1GB VM"
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Date: Sat, 16 Apr 2022 00:25:23 UTC
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 -- Peter Jeremy