On Tue, Nov 3, 2020 at 11:33 PM Atish Patra wrote:
>
> On Sat, Oct 31, 2020 at 12:42 AM Guo Ren wrote:
> >
> > On Sat, Oct 31, 2020 at 8:28 AM Steven Rostedt wrote:
> > >
> > > On Fri, 30 Oct 2020 14:47:56 -0700
> > > Atish Patra wrote:
> > >
> > > > > Look at arm64, they __kprobes flag and I
On Sat, Oct 31, 2020 at 12:42 AM Guo Ren wrote:
>
> On Sat, Oct 31, 2020 at 8:28 AM Steven Rostedt wrote:
> >
> > On Fri, 30 Oct 2020 14:47:56 -0700
> > Atish Patra wrote:
> >
> > > > Look at arm64, they __kprobes flag and I guess it would also prevent
> > > > ftrace call site.
> > > >
> > >
>
On Sat, Oct 31, 2020 at 8:28 AM Steven Rostedt wrote:
>
> On Fri, 30 Oct 2020 14:47:56 -0700
> Atish Patra wrote:
>
> > > Look at arm64, they __kprobes flag and I guess it would also prevent
> > > ftrace call site.
> > >
> >
> > Are you sure about that ? __kprobes puts the code in .kprobes.text
On Fri, 30 Oct 2020 14:47:56 -0700
Atish Patra wrote:
> > Look at arm64, they __kprobes flag and I guess it would also prevent
> > ftrace call site.
> >
>
> Are you sure about that ? __kprobes puts the code in .kprobes.text section
> which is under whitelist sections in recordmcount.pl &
On Thu, Oct 29, 2020 at 8:28 PM Guo Ren wrote:
>
> On Fri, Oct 30, 2020 at 2:46 AM Atish Patra wrote:
> >
> > On Thu, Oct 29, 2020 at 9:06 AM Guo Ren wrote:
> > >
> > > On Thu, Oct 29, 2020 at 10:34 AM Zong Li wrote:
> > > >
> > > > On Thu, Oct 29, 2020 at 8:23 AM Atish Patra
> > > > wrote:
On Fri, Oct 30, 2020 at 2:46 AM Atish Patra wrote:
>
> On Thu, Oct 29, 2020 at 9:06 AM Guo Ren wrote:
> >
> > On Thu, Oct 29, 2020 at 10:34 AM Zong Li wrote:
> > >
> > > On Thu, Oct 29, 2020 at 8:23 AM Atish Patra wrote:
> > > >
> > > > On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
> > > > >
On Thu, Oct 29, 2020 at 9:06 AM Guo Ren wrote:
>
> On Thu, Oct 29, 2020 at 10:34 AM Zong Li wrote:
> >
> > On Thu, Oct 29, 2020 at 8:23 AM Atish Patra wrote:
> > >
> > > On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
> > > >
> > > > Hi Zong & Atish,
> > > >
> > > > In our 2 harts c910 chip, we
On Thu, Oct 29, 2020 at 10:34 AM Zong Li wrote:
>
> On Thu, Oct 29, 2020 at 8:23 AM Atish Patra wrote:
> >
> > On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
> > >
> > > Hi Zong & Atish,
> > >
> > > In our 2 harts c910 chip, we found:
> > >
> > > echo function >
On Thu, Oct 29, 2020 at 8:23 AM Atish Patra wrote:
>
> On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
> >
> > Hi Zong & Atish,
> >
> > In our 2 harts c910 chip, we found:
> >
> > echo function > /sys/kernel/debug/tracing/current_tracer
> > echo function_graph >
On Thu, Oct 29, 2020 at 8:23 AM Atish Patra wrote:
>
> On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
> >
> > Hi Zong & Atish,
> >
> > In our 2 harts c910 chip, we found:
> >
> > echo function > /sys/kernel/debug/tracing/current_tracer
> > echo function_graph >
Hi Zong & Atish,
In our 2 harts c910 chip, we found:
echo function > /sys/kernel/debug/tracing/current_tracer
echo function_graph > /sys/kernel/debug/tracing/current_tracer
echo function > /sys/kernel/debug/tracing/current_tracer
echo function_graph > /sys/kernel/debug/tracing/current_tracer
On Wed, Oct 28, 2020 at 8:44 AM Guo Ren wrote:
>
> Hi Zong & Atish,
>
> In our 2 harts c910 chip, we found:
>
> echo function > /sys/kernel/debug/tracing/current_tracer
> echo function_graph > /sys/kernel/debug/tracing/current_tracer
> echo function > /sys/kernel/debug/tracing/current_tracer
>
On Sat, Oct 24, 2020 at 3:29 AM Colin Ian King wrote:
>
> On 21/10/2020 08:38, Zong Li wrote:
> > Like the commit cb9d7fd51d9f ("watchdog: Mark watchdog touch functions
> > as notrace"), some architectures assume that the stopped CPUs don't make
> > function calls to traceable functions when they
On 21/10/2020 08:38, Zong Li wrote:
> Like the commit cb9d7fd51d9f ("watchdog: Mark watchdog touch functions
> as notrace"), some architectures assume that the stopped CPUs don't make
> function calls to traceable functions when they are in the stopped
> state. For example, it causes unexpected
On Wed, Oct 21, 2020 at 12:38 AM Zong Li wrote:
>
> Like the commit cb9d7fd51d9f ("watchdog: Mark watchdog touch functions
> as notrace"), some architectures assume that the stopped CPUs don't make
> function calls to traceable functions when they are in the stopped
> state. For example, it
On Wed, Oct 21, 2020 at 11:54:51AM -0400, Steven Rostedt wrote:
> On Wed, 21 Oct 2020 08:44:56 -0700
> "Paul E. McKenney" wrote:
>
> > Or let me know if you would like me to take it, target v5.11.
>
> I'm not sure if these can wait, as I believe they are fixing a regression
> with RISCV
On Wed, 21 Oct 2020 08:44:56 -0700
"Paul E. McKenney" wrote:
> Or let me know if you would like me to take it, target v5.11.
I'm not sure if these can wait, as I believe they are fixing a regression
with RISCV function tracing.
Probably best to have them go through the RISCV tree.
-- Steve
On Wed, Oct 21, 2020 at 10:15:22AM -0400, Steven Rostedt wrote:
> On Wed, 21 Oct 2020 10:12:16 -0400
> Steven Rostedt wrote:
>
> > > Fixes: 4ecf0a43e729 ("processor: get rid of cpu_relax_yield")
> > > Fixes: 366237e7b083 ("stop_machine: Provide RCU quiescent state in
> > > multi_cpu_stop()")
>
On Wed, 21 Oct 2020 10:12:16 -0400
Steven Rostedt wrote:
> > Fixes: 4ecf0a43e729 ("processor: get rid of cpu_relax_yield")
> > Fixes: 366237e7b083 ("stop_machine: Provide RCU quiescent state in
> > multi_cpu_stop()")
>
> I really do not like to add "notrace" to core functions because a single
On Wed, 21 Oct 2020 15:38:39 +0800
Zong Li wrote:
> Like the commit cb9d7fd51d9f ("watchdog: Mark watchdog touch functions
> as notrace"), some architectures assume that the stopped CPUs don't make
> function calls to traceable functions when they are in the stopped
> state. For example, it
Like the commit cb9d7fd51d9f ("watchdog: Mark watchdog touch functions
as notrace"), some architectures assume that the stopped CPUs don't make
function calls to traceable functions when they are in the stopped
state. For example, it causes unexpected kernel crashed when switching
tracer on
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