On Sat, Feb 6, 2010 at 11:16 AM, erik quanstrom <quans...@quanstro.net> wrote: >> ilock() (pc/lock.c) calls splhi() and then calls lock(). If that lock were >> contended, >> how would the system not stop? And on a UP system, if you're inside an >> splhi() block, >> why would you need to take an uncontended lock? > > good question. on a up system, splhi() is sufficient. on a mp > system, the losing process will spin until the winning process > is finished. > > ken fs does need to return to its mp roots. >
Did kenfs ever run on MP systems and use >1 CPU? -- vs
