Date: Mon, 16 Apr 2001 21:18:08 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/alpha/alpha mp_machdep.c src/sys/i386/i386 mp_machdep.c src/sys/kern kern_shutdown.c src/sys/powerpc/powerpc mp_machdep.c src/sys/sys kernel.h Message-ID: <200104170418.f3H4I8U04577@freefall.freebsd.org>
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jhb 2001/04/16 21:18:08 PDT
Modified files:
sys/alpha/alpha mp_machdep.c
sys/i386/i386 mp_machdep.c
sys/kern kern_shutdown.c
sys/powerpc/powerpc mp_machdep.c
sys/sys kernel.h
Log:
Blow away the panic mutex in favor of using a single atomic_cmpset() on a
panic_cpu shared variable. I used a simple atomic operation here instead
of a spin lock as it seemed to be excessive overhead. Also, this can avoid
recursive panics if, for example, witness is broken.
Revision Changes Path
1.15 +1 -4 src/sys/alpha/alpha/mp_machdep.c
1.153 +1 -5 src/sys/i386/i386/mp_machdep.c
1.98 +10 -2 src/sys/kern/kern_shutdown.c
1.5 +1 -5 src/sys/powerpc/powerpc/mp_machdep.c
1.86 +1 -4 src/sys/sys/kernel.h
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