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CVS commit: src/sys

Module Name:    src
Committed By:   dyoung
Date:           Tue Nov  3 05:23:28 UTC 2009

Modified Files:
        src/sys/arch/i386/conf: files.i386
        src/sys/arch/i386/i386: spl.S
        src/sys/arch/x86/x86: patch.c
        src/sys/arch/xen/conf: files.xen
        src/sys/kern: init_main.c kern_stub.c subr_prf.c
        src/sys/sys: systm.h
Added Files:
        src/sys/kern: subr_spldebug.c
        src/sys/sys: spldebug.h

Log Message:
Add a kernel configuration flag, SPLDEBUG, that activates a per-CPU log
of transitions to IPL_HIGH from lower IPLs.  SPLDEBUG is only available
on i386 and Xen kernels, today.

'options SPLDEBUG' adds instrumentation to spllower() and splraise() as
well as routines to start/stop debugging and to record IPL transitions:
spldebug_start(), spldebug_stop(), spldebug_raise(), spldebug_lower().

To generate a diff of this commit:
cvs rdiff -u -r1.351 -r1.352 src/sys/arch/i386/conf/files.i386
cvs rdiff -u -r1.32 -r1.33 src/sys/arch/i386/i386/spl.S
cvs rdiff -u -r1.18 -r1.19 src/sys/arch/x86/x86/patch.c
cvs rdiff -u -r1.105 -r1.106 src/sys/arch/xen/conf/files.xen
cvs rdiff -u -r1.407 -r1.408 src/sys/kern/init_main.c
cvs rdiff -u -r1.20 -r1.21 src/sys/kern/kern_stub.c
cvs rdiff -u -r1.136 -r1.137 src/sys/kern/subr_prf.c
cvs rdiff -u -r0 -r1.1 src/sys/kern/subr_spldebug.c
cvs rdiff -u -r0 -r1.1 src/sys/sys/spldebug.h
cvs rdiff -u -r1.236 -r1.237 src/sys/sys/systm.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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