When running security/tripwire (compute checksum on all the files), the system is under heavy i/o, the system hangup. If I compile a kernel with /usr/src/sys/kern/vfs_subr.c at revision 291757 all return to normal. see also the stable mailing list: http://docs.freebsd.org/cgi/mid.cgi?56B761A4.7010901 Henri PS also in 10.3-BETA2.
Please see https://lists.freebsd.org/pipermail/freebsd-stable/2016-February/084180.html . As suggested by marius@, I have upgrade the affected box to FreeBSD 10.3-BETA2 #0 r295834M with the proposed patch. So far so good, and I have reactivated the periodic scripts. But meanwhile I had been playing with ZFS / ARC tuning, and this might have some impacts. Henri, could you please try this patch and report back?
I try the patch and it is OK as I report on the ML Henri
A commit references this bug: Author: marius Date: Tue Feb 23 01:09:35 UTC 2016 New revision: 295905 URL: https://svnweb.freebsd.org/changeset/base/295905 Log: In preparation for 10.3-RELEASE, temporarily revert the MFC of r291244 done as part of r292895 on stable/10 as that change causes hangs with ZFS and the cause on at least amd64 so far not understood. Discussed with: kib For further information see: https://lists.freebsd.org/pipermail/freebsd-stable/2016-February/084045.html PR: 207281 Approved by: re (gjb) Changes: _U stable/10/ stable/10/sys/kern/vfs_subr.c
Over to marius, who did the revert.