https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231117
--- Comment #27 from commit-h...@freebsd.org --- A commit references this bug: Author: rgrimes Date: Sat May 18 19:32:39 UTC 2019 New revision: 347960 URL: https://svnweb.freebsd.org/changeset/base/347960 Log: bhyve virtio needs barriers Under certain tight race conditions, we found that the lack of a memory barrier in bhyve's virtio handling causes it to miss a NO_NOTIFY state transition on block devices, resulting in guest stall. The investigation is recorded in OS-7613. As part of the examination into bhyve's use of barriers, one other section was found to be problematic, but only on non-x86 ISAs with less strict memory ordering. That was addressed in this patch as well, although it was not at all a problem on x86. PR: 231117 Submitted by: Patrick Mooney <patrick.moo...@joyent.com> Reviewed by: jhb, kib, rgrimes Approved by: jhb MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D19501 Changes: head/usr.sbin/bhyve/virtio.c -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
