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| author | avg <avg@FreeBSD.org> | 2013-02-03 09:57:39 +0000 |
|---|---|---|
| committer | avg <avg@FreeBSD.org> | 2013-02-03 09:57:39 +0000 |
| commit | 08016a40d72d610ac6322ad147f8a8ff7ac0e1e7 (patch) | |
| tree | 0cbd8af6d2fcc2391a51c88f2c190865a8310018 /sys/conf/NOTES | |
| parent | e1f3d4e1aa9f4cf116f0046597bb1fe1ee36951b (diff) | |
| download | FreeBSD-src-08016a40d72d610ac6322ad147f8a8ff7ac0e1e7.zip FreeBSD-src-08016a40d72d610ac6322ad147f8a8ff7ac0e1e7.tar.gz | |
allow for large KTR_ENTRIES values by allocating ktr_buf using malloc(9)
Only during very early boot, before malloc(9) is functional (SI_SUB_KMEM),
the static ktr_buf_init is used. Size of the static buffer is determined
by a new kernel option KTR_BOOT_ENTRIES. Its default value is 1024.
This commit builds on top of r243046.
Reviewed by: alc
MFC after: 17 days
Diffstat (limited to 'sys/conf/NOTES')
| -rw-r--r-- | sys/conf/NOTES | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/conf/NOTES b/sys/conf/NOTES index 216d2f5..ff245ed 100644 --- a/sys/conf/NOTES +++ b/sys/conf/NOTES @@ -446,6 +446,8 @@ options KTRACE_REQUEST_POOL=101 # KTR is a kernel tracing facility imported from BSD/OS. It is # enabled with the KTR option. KTR_ENTRIES defines the number of # entries in the circular trace buffer; it may be an arbitrary number. +# KTR_BOOT_ENTRIES defines the number of entries during the early boot, +# before malloc(9) is functional. # KTR_COMPILE defines the mask of events to compile into the kernel as # defined by the KTR_* constants in <sys/ktr.h>. KTR_MASK defines the # initial value of the ktr_mask variable which determines at runtime @@ -459,7 +461,8 @@ options KTRACE_REQUEST_POOL=101 # if KTR_VERBOSE is not defined. See ktr(4) and ktrdump(8) for details. # options KTR -options KTR_ENTRIES=1024 +options KTR_BOOT_ENTRIES=1024 +options KTR_ENTRIES=(128 * 1024) options KTR_COMPILE=(KTR_INTR|KTR_PROC) options KTR_MASK=KTR_INTR options KTR_CPUMASK=0x3 |
