https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206492

Mark Millard <mar...@dsl-only.net> changed:

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                 CC|                            |mar...@dsl-only.net

--- Comment #2 from Mark Millard <mar...@dsl-only.net> ---
If you use a swapfile on a file-system/partition that gets a mix of other IO
then see

Bug 206048 - 11.0-CURRENT -r293227 (and others) arm (rpi2/BeagleBone Black)
amd64 etc: swapfile usage hangs; swap partition works

for a problem that may apply to 10.x as well when using things like:

file=/var/spool/swap/swapfile
file=/swap0

--unless those files are on their own file systems/partitions not used for
other (used) files.

It may be worth testing if the involved 10.x context(s) hang before settling on
this sort of placement of the file. One of the comments suggested a command
like:

stress -d 2 -m 3 --vm-keep

was sufficient to show the problem on at least 11.0-CURRENT amd64 contexts. I
guess that command is from the port sysutils/stress .

It would actually be good to have 10.x comments in Bug 206048 reporting how
such testing went if someone tries it.

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