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| author |   kettenis <kettenis@openbsd.org> | 2014-09-12 09:52:45 +0000 |
|---|---|---|
| committer | kettenis <kettenis@openbsd.org> | 2014-09-12 09:52:45 +0000 |
| commit | f6650e177111d6e9855a0240261b4ae88b06466a (patch) | |
| tree | 853886178692d16858f7463466eb8fd3427f841f /share/man/man4 | |
| parent | dont leak a ccb in identify (diff) | |
| download | wireguard-openbsd-f6650e177111d6e9855a0240261b4ae88b06466a.tar.xz wireguard-openbsd-f6650e177111d6e9855a0240261b4ae88b06466a.zip | |
Remove the code that attempts to synchronize P-state transitions between CPUs.
Spinning inside an IPI handler is generally a bad idea as it is very hard to
avoid deadlocks. As far as I can tell the synchronization isn't necessary.
Multi-core CPUs have hardware mechanisms to do the appropropriate coordination
between cores and coordination between sockets isn't necessary either.
This seems to fix the various hangs and suspend/resume failures that people
have been seeing when running apmd -A or apmd -C.
Tested by many.
ok kspillner@, mpi@
Diffstat (limited to 'share/man/man4')
0 files changed, 0 insertions, 0 deletions