On Mon, Jul 25, 2011 at 02:29:24PM -0700, Randy Dunlap wrote:
> On Sun, 24 Jul 2011 18:15:14 -0700 Stephen Boyd wrote:
>
> > Usually kernel parameters are documented in kernel-parameters.txt
> > but user_debug is only documented in the Kconfig. Document the
> > option and point to the Kconfig help text for more info.
> >
> > Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
> > Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
>
> Is this a superset of 'print_fatal_signals'?
>
> Applied, thanks.
>
> > ---
> > Documentation/kernel-parameters.txt | 10 ++++++++++
> > 1 files changed, 10 insertions(+), 0 deletions(-)
> >
> > diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> > index aa47be7..8186adc 100644
> > --- a/Documentation/kernel-parameters.txt
> > +++ b/Documentation/kernel-parameters.txt
> > @@ -2612,6 +2612,16 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
> > medium is write-protected).
> > Example: quirks=0419:aaf5:rl,0421:0433:rc
> >
> > + user_debug= [KNL,ARM]
> > + Format: <int>
> > + See arch/arm/Kconfig.debug help text.
> > + 1 - undefined instruction events
> > + 2 - system calls
linux$ git grep UDBG_SYSCALL -- arch/arm/
include/asm/system.h:#define UDBG_SYSCALL (1 << 1)
kernel/traps.c: if (user_debug & UDBG_SYSCALL) {
kernel/traps.c: if (user_debug & UDBG_SYSCALL) {
Looking at kernel/traps.c, it looks like only undefined or obsolete
syscalls are logged. It could be worth clarifying this in the wording,
both here and in arch/arm/Kconfig.debug.
Cheers
---Dave
> > + 4 - invalid data aborts
> > + 8 - SIGSEGV faults
> > + 16 - SIGBUS faults
> > + Example: user_debug=31
> > +
> > userpte=
> > [X86] Flags controlling user PTE allocations.
> >
> > --
> > Sent by an employee of the Qualcomm Innovation Center, Inc.
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
>
> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
>
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