https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253087
--- Comment #6 from commit-h...@freebsd.org --- A commit in branch stable/13 references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=ec24f78e5b201ea56a69607c6e4438a2faac25c0 commit ec24f78e5b201ea56a69607c6e4438a2faac25c0 Author: Kyle Evans <kev...@freebsd.org> AuthorDate: 2021-03-08 20:20:10 +0000 Commit: Kyle Evans <kev...@freebsd.org> CommitDate: 2021-03-12 18:43:43 +0000 x86: tsc: deprioritize TSC on VirtualBox Misbehavior has been observed with TSC under VirtualBox, where threads doing small sleeps (~1 second) may miss their wake up and hang around in a sleep state indefinitely. Switching back to ACPI-fast decidedly fixes it, so stop using TSC on VirtualBox at least for the time being. This partially reverts 84eaf2ccc6aa, applying it only to VirtualBox and increasing the quality to 0. Negative qualities can never be chosen and cannot be chosen with the tunable recently added. If we do not have a timecounter with a higher quality than 0, then TSC does at least leave the system mostly usable. PR: 253087 (cherry picked from commit 8cc15b0dfc2f3299662e78f18bd6127f83c14ab4) sys/x86/x86/tsc.c | 8 ++++++++ 1 file changed, 8 insertions(+) -- You are receiving this mail because: You are on the CC list 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"
