On Thu, Aug 05, 2010 at 09:35:05PM +0900, Masami Hiramatsu wrote: > Update kprobes.txt about interrupts disabled state inside > kprobes handlers, because optimized probe/boosted kretprobe > run without disabling interrrupts on x86. > > Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx> > Cc: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx> Acked-by: Ananth N Mavinakayanahalli <ananth@xxxxxxxxxx> > Cc: linux-kernel@xxxxxxxxxxxxxxx > Cc: linux-doc@xxxxxxxxxxxxxxx > --- > > Documentation/kprobes.txt | 8 +++++--- > 1 files changed, 5 insertions(+), 3 deletions(-) > > diff --git a/Documentation/kprobes.txt b/Documentation/kprobes.txt > index 6653017..4189f01 100644 > --- a/Documentation/kprobes.txt > +++ b/Documentation/kprobes.txt > @@ -541,9 +541,11 @@ Kprobes does not use mutexes or allocate memory except during > registration and unregistration. > > Probe handlers are run with preemption disabled. Depending on the > -architecture, handlers may also run with interrupts disabled. In any > -case, your handler should not yield the CPU (e.g., by attempting to > -acquire a semaphore). > +architecture and optimization state, handlers may also run with > +interrupts disabled (e.g., kretprobe handlers and optimized kprobe > +handlers run without interrupt disabled on x86/x86-64). In any case, > +your handler should not yield the CPU (e.g., by attempting to acquire > +a semaphore). > > Since a return probe is implemented by replacing the return > address with the trampoline's address, stack backtraces and calls > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
