freebsd-dev/sys/amd64
John Birrell e0b651251d Turn console printf buffering into a kernel option and only on
by default for sun4v where it is absolutely required.

This change moves the buffer from struct pcpu to the stack to avoid
using the critical section which created a LOR in a couple of cases
due to interaction with the tty code and kqueue. The LOR can't be
fixed with the critical section and the pcpu buffer can't be used
without the critical section.

Putting the buffer on the stack was my initial solution, but it was
pointed out that the stress on the stack might cause problems
depending on the call path. We don't have a way of creating tests
for those possible cases, so it's best to leave this as an option
for the time being. In time we may get enough data to enable this
option more generally.
2006-11-30 04:17:05 +00:00
..
acpica First pass at allowing memory to be mapped using cache modes other than 2006-08-11 19:22:57 +00:00
amd64 Turn console printf buffering into a kernel option and only on 2006-11-30 04:17:05 +00:00
compile
conf It's been possible to build linprocfs as a module for some time now. 2006-11-22 10:34:12 +00:00
ia32 Move some declaration of 32-bit signal structures into file 2006-10-05 01:56:11 +00:00
include The global variable avail_end is redundant and only used once. Eliminate 2006-11-19 20:54:58 +00:00
isa Change the x86 interrupt code to suspend/resume interrupt controllers 2006-10-10 23:23:12 +00:00
linux32 Regen. 2006-11-11 21:49:08 +00:00
pci MD support for PCI Message Signalled Interrupts on amd64 and i386: 2006-11-13 22:23:34 +00:00
Makefile