Date: Fri, 14 Aug 2015 09:38:07 -0700 From: Carl Johnson <carlj@peak.org> To: freebsd-stable@freebsd.org Subject: Re: Swap Questions Message-ID: <87wpwxesgg.fsf@elk.localnet> In-Reply-To: <55CE1654.8030304@tundraware.com> (Tim Daneliuk's message of "Fri, 14 Aug 2015 11:24:52 -0500") References: <55CDE9EE.5090603@tundraware.com> <280266DF-AD94-4DC2-A5E1-AD0603B33BFE@punkt.de> <55CDFF32.3020809@tundraware.com> <874mk1g9b6.fsf@elk.localnet> <55CE1654.8030304@tundraware.com>
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Tim Daneliuk <tundra@tundraware.com> writes: > On 08/14/2015 10:48 AM, Carl Johnson wrote: >> Tim Daneliuk <tundra@tundraware.com> writes: >> >>> On 08/14/2015 08:53 AM, Patrick M. Hausen wrote: >>>> HI! >>>> >>>>> Am 14.08.2015 um 15:15 schrieb Tim Daneliuk <tundra@tundraware.com>: >>>>> >>>>> I just built a 10.2 machine on a cloud-based VPS (Digital Ocean) that has >>>>> 512M of memory and 1G of swap partition. I am seeing a ton of errors like >>>>> this: >>>>> >>>>> [...] >>>>> So, I added this to fstab (after creating /usr/swap0): >>>> >>>> Did you create it with dd or just with touch? You need to create a >>>> file that actually occupies the disk blocks with dd. >>>> >>>> HTH >>>> Patrick >>>> >>> >>> The file was actually created, and space reserved. >> >> Try removing the md99 device with mdconfig and then run the swapon again. >> > > Now we're getting somewhere. The problem I discovered is that if I do this: > > 1) Remove fstab entry for swap file and reboot > 2) Reinstall fstab entry for swap and swapon > > Voila' - it works. BUT ... if I then swapoff that disk *the md device does > not go away and cannot be removed with mdcoswapon -a > swapon: md99 on /usr/swap0: Device already in use > nfig: > > mdconfig -d md99 > mdconfig: file can only be used with -a > > > I also cannot reenable it as swap again (which is why this appeared to not > be working: > > swapon -a > swapon: md99 on /usr/swap0: Device already in use > > > IOW, the system thinks the /dev/md99 is still in use even though I have swapped it > off and will neither automatically remove the device nor allow me to do so manually. I should have mentioned that I had similar problems until I added the "late" option to the swapfile line in fstab. I suspect that it is a general problem with swapfiles and should be in the swapfile example in the fstab(5) manpage. -- Carl Johnson carlj@peak.org
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