| NOTES (131476) | NOTES (131481) |
|---|---|
| 1# $FreeBSD: head/sys/conf/NOTES 131476 2004-07-02 19:40:36Z pjd $ | 1# $FreeBSD: head/sys/conf/NOTES 131481 2004-07-02 20:21:44Z jhb $ |
| 2# 3# NOTES -- Lines that can be cut/pasted into kernel and hints configs. 4# 5# Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers', 6# 'makeoptions', 'hints', etc. go into the kernel configuration that you 7# run config(8) with. 8# 9# Lines that begin with 'hint.' are NOT for config(8), they go into your --- 171 unchanged lines hidden (view full) --- 181 182# MUTEX_WAKE_ALL changes the mutex unlock algorithm to wake all waiters 183# when a contested mutex is released rather than just awaking the highest 184# priority waiter. 185options MUTEX_WAKE_ALL 186 187# SMP Debugging Options: 188# | 2# 3# NOTES -- Lines that can be cut/pasted into kernel and hints configs. 4# 5# Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers', 6# 'makeoptions', 'hints', etc. go into the kernel configuration that you 7# run config(8) with. 8# 9# Lines that begin with 'hint.' are NOT for config(8), they go into your --- 171 unchanged lines hidden (view full) --- 181 182# MUTEX_WAKE_ALL changes the mutex unlock algorithm to wake all waiters 183# when a contested mutex is released rather than just awaking the highest 184# priority waiter. 185options MUTEX_WAKE_ALL 186 187# SMP Debugging Options: 188# |
| 189# FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel 190# threads. It sole use is to expose race conditions and other 191# bugs during development. Enabling this option will reduce 192# performance and increase the frequency of kernel panics by 193# design. If you aren't sure that you need it then you don't. |
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| 189# MUTEX_DEBUG enables various extra assertions in the mutex code. 190# SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table 191# used to hold active sleep queues. 192# TURNSTILE_PROFILING enables rudimentary profiling of the hash table 193# used to hold active lock queues. 194# WITNESS enables the witness code which detects deadlocks and cycles 195# during locking operations. 196# WITNESS_DDB causes the witness code to drop into the kernel debugger if 197# a lock hierarchy violation occurs or if locks are held when going to 198# sleep. 199# WITNESS_SKIPSPIN disables the witness checks on spin mutexes. | 194# MUTEX_DEBUG enables various extra assertions in the mutex code. 195# SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table 196# used to hold active sleep queues. 197# TURNSTILE_PROFILING enables rudimentary profiling of the hash table 198# used to hold active lock queues. 199# WITNESS enables the witness code which detects deadlocks and cycles 200# during locking operations. 201# WITNESS_DDB causes the witness code to drop into the kernel debugger if 202# a lock hierarchy violation occurs or if locks are held when going to 203# sleep. 204# WITNESS_SKIPSPIN disables the witness checks on spin mutexes. |
| 205options FULL_PREEMPTION |
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| 200options MUTEX_DEBUG 201options WITNESS 202options WITNESS_DDB 203options WITNESS_SKIPSPIN 204 205# MUTEX_PROFILING - Profiling mutual exclusion locks (mutexes). See 206# MUTEX_PROFILING(9) for details. 207options MUTEX_PROFILING --- 2227 unchanged lines hidden --- | 206options MUTEX_DEBUG 207options WITNESS 208options WITNESS_DDB 209options WITNESS_SKIPSPIN 210 211# MUTEX_PROFILING - Profiling mutual exclusion locks (mutexes). See 212# MUTEX_PROFILING(9) for details. 213options MUTEX_PROFILING --- 2227 unchanged lines hidden --- |