On 6/24/20, Greg 'groggy' Lehey <g...@freebsd.org> wrote: > On Wednesday, 24 June 2020 at 18:51:04 -0700, Donald Wilde wrote: >> On 6/24/20, Greg 'groggy' Lehey <g...@freebsd.org> wrote: >>> On Wednesday, 24 June 2020 at 9:36:23 -0700, Donald Wilde wrote: >>>> All, >>>> >>>> I recently upgraded my 12-STABLE system to the latest, and now my >>>> swap subsystems aren't working. I deliberately set up a 40GB >>>> partition for swap, and when I do 'top -t' I am only seeing 7906M >>>> total. >>> >>> That looks suspiciously like the difference from 32 GB. Could it be >>> numeric overflow? And if so, where? What does pstat -s say? >> >> Well, hi Greg! LTNT2! > > Indeed. > >> pstat -shm: >> >> /dev/ada0s1b 65536 (1M blocks), Used: 1.5G, Avail: 63G, Capacity: 2% > > Now that's really puzzling. Why does it say 64 G when you said 40 G, > and the error from top tends to confirm it? How big is the partition > (gpart output)?
Attached 'gpart list' output Reduced kern.maxswzone to 9999999. Is it decimal or unlabeled hex? 'top' now shows 4597M total swap. > >>>> When using synth, it shows swap usage of < 2%, but then it gives the >>>> 'out of swap' complaint and tosses all my users out into neverland. >>> >>> Unless this also causes kernel messages to that effect, this, too, >>> could be an issue with synth. >> >> I believe the messages about 'out of swap' were from the kernel as >> it died, not synth. As I say, it killed all my active users, both >> root and non-root. Okay, I've now got data on that. It crashed again. :-\ First, the kernel killed init-spawned PIDs up into the 12000s: 'out of swap space'. Next, I get the following 5 times, boldface (this is console, not a GUI): swblk zone ok swap blk zone exhausted, increase kern.maxswzone Back to normal font, the kernel killed four cron-job PIDs, 'out of swap space' At this point, if I hit a <cr>, I get a login prompt. > > Hmm. > >> Why does _top_ show the 7906M number? I suspect that it's deeper >> than just synth. > > If top counts swap in a form that overflows at 32 GB, 40 GB could show > up as 8 GB. > >> What else can I share to help diagnose this? > > Background, maybe? You say that you upgraded your system. Did you > change the swap size when you did? What were swap and RAM sizes > before and after? Meant that I upgraded from 12.1-RELEASE to 12-STABLE. When I configured the -RELEASE install, I manually messed with the MBR disk partitions. This is nominally a half-TB HDD which showed up as a total of 446 G available (IIRC, gpart should show it's actual size). I did auto partitioning, looked at the sizes, and manually set my partitions to give me 40G of swap instead of the auto-generated size of 4G. This is an old Dell i3 laptop. It's really generic, picked specifically as something I could use for Ubuntu or FreeBSD. Dell SERVICE TAG is 5K8W162, but it's a generic i3 with 4G of RAM. I'm developing a multi-server application for my cousin, so I'm using this as a mule to work my way through some of the issues involved in that project, from FreeBSD itself through NGINX and Lua, etc. > > FWIW, I've had a very large number of issues with -STABLE in recent > months, though not this one. I should send a separate message. > I guess I've been fortunate, then. Most of my issues have been with re-learning FreeBSD. :D -- Don Wilde **************************************************** * What is the Internet of Things but a system * * of systems including humans? * ****************************************************
Geom name: ada0 modified: false state: OK fwheads: 16 fwsectors: 63 last: 976773167 first: 63 entries: 4 scheme: MBR Providers: 1. Name: ada0s1 Mediasize: 500107829248 (466G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r2w2e3 efimedia: HD(1,MBR,0x90909090,0x40,0x3a385ff0) attrib: active rawtype: 165 length: 500107829248 offset: 32768 type: freebsd index: 1 end: 976773167 start: 64 Consumers: 1. Name: ada0 Mediasize: 500107862016 (466G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r2w2e5 Geom name: ada0s1 modified: false state: OK fwheads: 16 fwsectors: 63 last: 976773103 first: 0 entries: 8 scheme: BSD Providers: 1. Name: ada0s1a Mediasize: 429496729600 (400G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r1w1e1 rawtype: 7 length: 429496729600 offset: 0 type: freebsd-ufs index: 1 end: 838860799 start: 0 2. Name: ada0s1b Mediasize: 70611099648 (66G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r1w1e0 rawtype: 1 length: 70611099648 offset: 429496729600 type: freebsd-swap index: 2 end: 976773103 start: 838860800 Consumers: 1. Name: ada0s1 Mediasize: 500107829248 (466G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r2w2e3
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