On Sun, 12 Nov 2017, Bruce Evans wrote:
On Sun, 12 Nov 2017, Mateusz Guzik wrote:
Log:
amd64: stop nesting preemption counter in spinlock_enter
Discussed with:jhb
This seems to break it. i386 still has the old code.
...
The main broken case is:
- both levels initially 0
-
On Sun, 12 Nov 2017, Mateusz Guzik wrote:
Log:
amd64: stop nesting preemption counter in spinlock_enter
Discussed with:jhb
This seems to break it. i386 still has the old code.
It also moves the critical section a little, so that it is inconsistent
for enter/exit. I think the
Author: mjg
Date: Sun Nov 12 03:13:01 2017
New Revision: 325734
URL: https://svnweb.freebsd.org/changeset/base/325734
Log:
amd64: stop nesting preemption counter in spinlock_enter
Discussed with: jhb
Modified:
head/sys/amd64/amd64/machdep.c
Modified:
