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* oopsderaadt2008-11-061-2/+2
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* panic if cpu_switchto() returns from a dead processderaadt2008-11-061-1/+2
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* Bring biomem diff back into the tree after the nfs_bio.c fix went in.deraadt2008-06-121-1/+3
| | | | ok thib beck art
* back out biomem diff since it is not right yet. Doing very largederaadt2008-06-111-3/+1
| | | | | | | | file copies to nfsv2 causes the system to eventually peg the console. On the console ^T indicates that the load is increasing rapidly, ddb indicates many calls to getbuf, there is some very slow nfs traffic making none (or extremely slow) progress. Eventually some machines seize up entirely.
* Buffer cache revampbeck2008-06-101-1/+3
| | | | | | | | | | | | | | | | 1) remove multiple size queues, introduced as a stopgap. 2) decouple pages containing data from their mappings 3) only keep buffers mapped when they actually have to be mapped (right now, this is when buffers are B_BUSY) 4) New functions to make a buffer busy, and release the busy flag (buf_acquire and buf_release) 5) Move high/low water marks and statistics counters into a structure 6) Add a sysctl to retrieve buffer cache statistics Tested in several variants and beat upon by bob and art for a year. run accidentally on henning's nfs server for a few months... ok deraadt@, krw@, art@ - who promises to be around to deal with any fallout
* use sched_is_idle() and nuke the sched_chooseproc prototype since wethib2008-06-081-3/+2
| | | | already have on in sched.h
* Move the implementation of __mp_lock (biglock) into machine dependentart2007-11-261-2/+2
| | | | | | | | | | | | | | code. At this moment all architectures get the copy of the old code except i386 which gets a new shiny implementation that doesn't spin at splhigh (doh!) and doesn't try to grab the biglock when releasing the biglock (double doh!). Shaves 10% of system time during kernel compile and might solve a few bugs as a bonus. Other architectures coming shortly. miod@ deraadt@ ok
* Make context switching much more MI:art2007-10-101-0/+242
- Move the functionality of choosing a process from cpu_switch into a much simpler function: cpu_switchto. Instead of having the locore code walk the run queues, let the MI code choose the process we want to run and only implement the context switching itself in MD code. - Let MD context switching run without worrying about spls or locks. - Instead of having the idle loop implemented with special contexts in MD code, implement one idle proc for each cpu. make the idle loop MI with MD hooks. - Change the proc lists from the old style vax queues to TAILQs. - Change the sleep queue from vax queues to TAILQs. This makes wakeup() go from O(n^2) to O(n) there will be some MD fallout, but it will be fixed shortly. There's also a few cleanups to be done after this. deraadt@, kettenis@ ok
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