On Fri, Oct 28, 2005 at 02:04:37PM +0100, Robert Watson wrote: > On Thu, 27 Oct 2005, Doug Poland wrote: > > > One of the other nice benefits to the SMPVFS work is that > > with our fully preemptive 6.x kernel, not holding the Giant > > lock over the file system code lets the file system code not > > only preempt lower precedence kernel threads, such as > > background crypto operations or file system operations, but be > > preempted by more timing critical code, such as sound card > > interrupts, network I/O, and so on. > > > >Does this mean that options PREEMPTION is assumed in 6.0? If not, could > >someone explain or point me to some docs that will help me understand. > > In FreeBSD 6.0 and higher, options PREEMPTION appears in the default > kernel configuration (GENERIC). Not on all architectures, though. e.g. PREEMPTION is not supported on sparc64. Kris
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