diff options
| author | jhb <jhb@FreeBSD.org> | 2000-10-27 03:00:28 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2000-10-27 03:00:28 +0000 |
| commit | 55ee2dc4c7c9657892acc8e35aa23729226bdcf2 (patch) | |
| tree | e9277d0de7bf42df6eb30d055f1018264e89d3db /sys | |
| parent | c5f27ab06c6d1de72893f2b9f4d2435c28eb6e18 (diff) | |
| download | FreeBSD-src-55ee2dc4c7c9657892acc8e35aa23729226bdcf2.zip FreeBSD-src-55ee2dc4c7c9657892acc8e35aa23729226bdcf2.tar.gz | |
Add and document the WITNESS_SKIPSPIN and WITNESS_DDB kernel options.
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/conf/NOTES | 6 | ||||
| -rw-r--r-- | sys/conf/options | 2 | ||||
| -rw-r--r-- | sys/i386/conf/NOTES | 6 |
3 files changed, 14 insertions, 0 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 222d01a..1103ccf 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -139,8 +139,14 @@ options APIC_IO # Symmetric (APIC) I/O # MUTEX_DEBUG enables various extra assertions in the mutex code. # WITNESS enables the mutex witness code which detects deadlocks and cycles # during locking operations. +# WITNESS_DDB causes the witness code to drop into the kernel debugger if +# a lock heirarchy violation occurs or if locks are held when going to +# sleep. +# WITNESS_SKIPSPIN disables the witness checks on spin mutexes. options MUTEX_DEBUG options WITNESS +options WITNESS_DDB +options WITNESS_SKIPSPIN ##################################################################### diff --git a/sys/conf/options b/sys/conf/options index 9d21ee6..6f86d74 100644 --- a/sys/conf/options +++ b/sys/conf/options @@ -466,6 +466,8 @@ KTR_ENTRIES opt_global.h KTR_EXTEND opt_global.h MUTEX_DEBUG opt_global.h WITNESS opt_global.h +WITNESS_DDB opt_witness.h +WITNESS_SKIPSPIN opt_witness.h # options for ACPI support ACPI_DEBUG opt_acpi.h diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES index 222d01a..1103ccf 100644 --- a/sys/i386/conf/NOTES +++ b/sys/i386/conf/NOTES @@ -139,8 +139,14 @@ options APIC_IO # Symmetric (APIC) I/O # MUTEX_DEBUG enables various extra assertions in the mutex code. # WITNESS enables the mutex witness code which detects deadlocks and cycles # during locking operations. +# WITNESS_DDB causes the witness code to drop into the kernel debugger if +# a lock heirarchy violation occurs or if locks are held when going to +# sleep. +# WITNESS_SKIPSPIN disables the witness checks on spin mutexes. options MUTEX_DEBUG options WITNESS +options WITNESS_DDB +options WITNESS_SKIPSPIN ##################################################################### |
