- Leica acquire 3.4.1 not working in sierra Patch#
- Leica acquire 3.4.1 not working in sierra password#
This is some of dimes output after resuming. The tricky scenario is setting the HANDOFF bit on an we must be careful to not leave HANDOFF set after we've acquired having the HANDOFF bit set on unlock requires care, we must not accepting the handoff must be careful to provide the ACQUIRE Handoff condition is owner = current, it can easily cause accepting a handoff must only be done in the wait-loop. There are a few tricky implementation details:
Leica acquire 3.4.1 not working in sierra Patch#
This re-introduces some of the wait time,īecause once we do a handoff we have to wait for the waiter to wake upĪ future patch will add a round of optimistic spinning to attempt toĪlleviate this penalty, but if that turns out to not be enough, we canĪdd a counter and only request handoff after multiple failed wakeups. This patch has the waiter requesting a handoff if it fails to acquire The down-side is of course that it allows for starvation. Lock stealing is an important performance optimization because waitingįor a waiter to wake up and get runtime can take a significant time,ĭuring which everyboy would stall on the lock. Where a running (or optimistic spinning) task beats the woken waiter Lock starvation is possible because mutex_lock() allows lock stealing,
Implement lock handoff to avoid lock starvation. Locking/mutex: Add lock handoff to avoid starvation
Leica acquire 3.4.1 not working in sierra password#
The keyboard is not working, you can't type the password to unlock gnomeīoth mouse and trackball are working after resuming, the laptop seems working (but no keyboard), and I can ssh into itĪfter a long bisection I got this commit:ĩd659ae14b545c4296e812c70493bfdc999b5c1c is the first bad commitĬommit 9d659ae14b545c4296e812c70493bfdc999b5c1c Resume it (I can do this with the keyboard) Version-Release number of selected component (if applicable):Īlways with my Sony Vaio VPCEH2H1E laptopġ. I can ssh into the laptop and reboot the machine. The mouse and trackball are not affected. I can resume with the keyboard, but after that I am stuck at the password prompt, which I can reach using the mouse or the trackball. This happened on Fedora 25 but I could reproduce it with vanilla kernels, too.Īfter resuming the laptop, the keyboard is not working anymore with kernel 4.10.86_64, but it worked with kernel 4.9.86_64
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