[Bug 231457] Out of swap space on ZFS

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231457

--- Comment #10 from dimka at dz.dn.ua ---
I experimented with a stable/11 branch on 2GB RAM and 8GB swap space with
r320475 "world" used, looking for the moment of kernel problems begins.
Swap on ZFS is unstable from revision r321453 (2017-07-25):
/usr/src/sys/kern/subr_blist.c
/usr/src/sys/sys/blist.h
And fully broken from r321554 (2017-07-26):
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dbuf.c
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/metaslab.c
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa_misc.c
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/space_map.c
/usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/spa.h
It happened between 11.1 and 11.2 release forks.
Also, swap on ZFS fully broken in the current revision of stable/11 r342915
(kernel and world used).

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