git: MPSAFE TTY - Refactor kprintf()'s spinlock, shutdown, move
commit 5fddbda2ad4306c54ebfde04cf94f0a83f54ad56
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Sun Aug 29 09:36:53 2010 -0700
MPSAFE TTY - Refactor kprintf()'s spinlock, shutdown, move cons_spin
* Adjust panic assertions to reduce reentrant panics.
* Redo the shutdown code to properly interlock panic_cpu_gd
* Move cons_lock into subr_prf.c and use a normal spinlock instead of
a deprecated (w/interrupt disablement) spinlock.
Adjust kvcprintf() when used with kputchar() to acquire cons_spin
only if the current cpu is not the currently panicing cpu.
Adjust kvcprintf() when used with kputchar() to acquire a hard
critical section.
Summary of changes:
sys/bus/cam/scsi/scsi_low.c | 6 +--
sys/ddb/db_output.c | 8 +++
sys/kern/kern_lock.c | 7 +--
sys/kern/kern_shutdown.c | 67 ++++++++++++++++++++--------
sys/kern/lwkt_thread.c | 2 +-
sys/kern/lwkt_token.c | 4 +-
sys/kern/subr_prf.c | 46 +++++++++++++++-----
sys/platform/pc32/i386/machdep.c | 8 ---
sys/platform/pc32/i386/spinlock.s | 8 ---
sys/platform/pc32/i386/userconfig.c | 10 ++---
sys/platform/pc32/include/lock.h | 2 -
sys/platform/pc64/include/lock.h | 2 -
sys/platform/pc64/x86_64/console.c | 15 ------
sys/platform/pc64/x86_64/machdep.c | 12 -----
sys/platform/pc64/x86_64/spinlock.s | 8 ---
sys/platform/vkernel/platform/console.c | 13 ------
sys/platform/vkernel64/platform/console.c | 13 ------
sys/sys/systm.h | 9 +---
18 files changed, 106 insertions(+), 134 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/5fddbda2ad4306c54ebfde04cf94f0a83f54ad56
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