On Mon, 8 Jan 2024 15:03:21 +
Mark Rutland wrote:
> On Mon, Jan 08, 2024 at 02:21:03PM +, Mark Rutland wrote:
> > On Mon, Jan 08, 2024 at 12:25:55PM +, Mark Rutland wrote:
> > > We also have HAVE_FUNCTION_GRAPH_RET_ADDR_PTR, but since the return
> > > address is
> > > not on the
Hi Mark,
On Thu, 11 Jan 2024 11:01:56 +
Mark Rutland wrote:
> On Thu, Jan 11, 2024 at 11:15:33AM +0900, Masami Hiramatsu wrote:
> > Hi Mark,
> >
> > Thanks for the investigation.
>
> Hi!
>
> As a heads-up, I already figured out the problem and sent a fixup at:
>
>
On Thu, Jan 11, 2024 at 11:15:33AM +0900, Masami Hiramatsu wrote:
> Hi Mark,
>
> Thanks for the investigation.
Hi!
As a heads-up, I already figured out the problem and sent a fixup at:
https://lore.kernel.org/lkml/ZZwEz8HsTa2IZE3L@FVFF77S0Q05N/
... and a more refined fix at:
Hi Mark,
Thanks for the investigation.
On Mon, 8 Jan 2024 12:25:55 +
Mark Rutland wrote:
> Hi,
>
> There's a bit more of an info-dump below; I'll go try to dump the fgraph
> shadow
> stack so that we can analyse this in more detail.
>
> On Mon, Jan 08, 2024 at 10:14:36AM +0900, Masami
On Mon, Jan 08, 2024 at 02:21:03PM +, Mark Rutland wrote:
> On Mon, Jan 08, 2024 at 12:25:55PM +, Mark Rutland wrote:
> > We also have HAVE_FUNCTION_GRAPH_RET_ADDR_PTR, but since the return address
> > is
> > not on the stack at the point function-entry is intercepted we use the FP as
> >
On Mon, Jan 08, 2024 at 12:25:55PM +, Mark Rutland wrote:
> We also have HAVE_FUNCTION_GRAPH_RET_ADDR_PTR, but since the return address is
> not on the stack at the point function-entry is intercepted we use the FP as
> the retp value -- in the absence of tail calls this will be different
Hi,
There's a bit more of an info-dump below; I'll go try to dump the fgraph shadow
stack so that we can analyse this in more detail.
On Mon, Jan 08, 2024 at 10:14:36AM +0900, Masami Hiramatsu wrote:
> On Fri, 5 Jan 2024 17:09:10 +
> Mark Rutland wrote:
>
> > On Mon, Dec 18, 2023 at
On Fri, 5 Jan 2024 17:09:10 +
Mark Rutland wrote:
> On Mon, Dec 18, 2023 at 10:13:46PM +0900, Masami Hiramatsu (Google) wrote:
> > From: Steven Rostedt (VMware)
> >
> > Allow for instances to have their own ftrace_ops part of the fgraph_ops
> > that makes the funtion_graph tracer filter on
On Mon, Dec 18, 2023 at 10:13:46PM +0900, Masami Hiramatsu (Google) wrote:
> From: Steven Rostedt (VMware)
>
> Allow for instances to have their own ftrace_ops part of the fgraph_ops
> that makes the funtion_graph tracer filter on the set_ftrace_filter file
> of the instance and not the top
Hi,
On Mon, 18 Dec 2023 22:13:46 +0900
"Masami Hiramatsu (Google)" wrote:
> @@ -408,15 +395,51 @@ int function_graph_enter(unsigned long ret, unsigned
> long func,
> return -EBUSY;
> }
>
> +/* This is called from ftrace_graph_func() via ftrace */
> +int
From: Steven Rostedt (VMware)
Allow for instances to have their own ftrace_ops part of the fgraph_ops
that makes the funtion_graph tracer filter on the set_ftrace_filter file
of the instance and not the top instance.
This also change how the function_graph handles multiple instances on the
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