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Document EARLY_PRINTF

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Warner Losh 2014-01-22 22:25:48 +00:00
parent d0754f0829
commit e79f350d87
1 changed files with 9 additions and 0 deletions
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9
sys/conf/NOTES
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@ -445,6 +445,15 @@ options DEBUG_MEMGUARD
#
options DEBUG_REDZONE
#
# EARLY_PRINTF enables support for calling a special printf (eprintf)
# very early in the kernel (before cn_init() has been called). This
# should only be used for debugging purposes early in boot. Normally,
# it is not defined. It is commented out here because this feature
# isn't generally available. And the required eputc() isn't defined.
#
#options EARLY_PRINTF
#
# KTRACE enables the system-call tracing facility ktrace(2). To be more
# SMP-friendly, KTRACE uses a worker thread to process most trace events