On Wed, Jan 16, 2019 at 09:57:39AM +, Julien Thierry wrote:
>
> I wanted to test this patch (and try to benchmark having the "mov x9,
> x30" always present in function prelude vs having two nops), but I
> cannot get this patch to apply (despite having a version including both
> commits below).
On 16/01/2019 15:56, Julien Thierry wrote:
> On 14/01/2019 12:26, Mark Rutland wrote:
>> On Mon, Jan 14, 2019 at 11:13:59PM +1100, Balbir Singh wrote:
>>> On Fri, Jan 04, 2019 at 05:50:18PM +, Mark Rutland wrote:
Hi Torsten,
On Fri, Jan 04, 2019 at 03:10:53PM +0100, Torsten Du
Hi,
On 14/01/2019 12:26, Mark Rutland wrote:
> On Mon, Jan 14, 2019 at 11:13:59PM +1100, Balbir Singh wrote:
>> On Fri, Jan 04, 2019 at 05:50:18PM +, Mark Rutland wrote:
>>> Hi Torsten,
>>>
>>> On Fri, Jan 04, 2019 at 03:10:53PM +0100, Torsten Duwe wrote:
Use -fpatchable-function-entry (g
On 16/01/2019 09:57, Julien Thierry wrote:
> Hi Torsten,
>
> On 04/01/2019 14:10, Torsten Duwe wrote:
>> Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
>> of each function. Replace the first NOP thus generated with a quick LR
>> saver (move it to scratch reg x9), so the 2n
Hi Torsten,
On 04/01/2019 14:10, Torsten Duwe wrote:
> Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
> of each function. Replace the first NOP thus generated with a quick LR
> saver (move it to scratch reg x9), so the 2nd replacement insn, the call
> to ftrace, does not clob
On Mon, Jan 14, 2019 at 11:13:59PM +1100, Balbir Singh wrote:
> On Fri, Jan 04, 2019 at 05:50:18PM +, Mark Rutland wrote:
> > Hi Torsten,
> >
> > On Fri, Jan 04, 2019 at 03:10:53PM +0100, Torsten Duwe wrote:
> > > Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
> > > of ea
On Fri, Jan 04, 2019 at 05:50:18PM +, Mark Rutland wrote:
> Hi Torsten,
>
> On Fri, Jan 04, 2019 at 03:10:53PM +0100, Torsten Duwe wrote:
> > Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
> > of each function. Replace the first NOP thus generated with a quick LR
> > save
On Fri, Jan 04, 2019 at 11:41:45PM +0100, Torsten Duwe wrote:
> On Fri, Jan 04, 2019 at 01:06:48PM -0500, Steven Rostedt wrote:
> > On Fri, 4 Jan 2019 17:50:18 +
> > Mark Rutland wrote:
> >
> > > At Linux Plumbers, I had a conversation with Steve Rostedt, and we came
> > > to the conclusion t
On Fri, Jan 4, 2019 at 8:05 PM Torsten Duwe wrote:
>
> Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
> of each function. Replace the first NOP thus generated with a quick LR
> saver (move it to scratch reg x9), so the 2nd replacement insn, the call
> to ftrace, does not clob
On Sat, 5 Jan 2019 12:05:43 +0100
Torsten Duwe wrote:
> > My point is: those 2 insn will _never_ be split by any alignment
> > boundary > 8; does that mean anything, have you considered this?
>
> Forget that. Steve mentioned the keyword *interrupt*, which creates a
> completely different situa
On Fri, Jan 04, 2019 at 11:41:45PM +0100, Torsten Duwe wrote:
> On Fri, Jan 04, 2019 at 01:06:48PM -0500, Steven Rostedt wrote:
> > On Fri, 4 Jan 2019 17:50:18 +
> > Mark Rutland wrote:
> >
> > > At Linux Plumbers, I had a conversation with Steve Rostedt, and we came
> > > to the conclusion t
On Fri, Jan 04, 2019 at 01:06:48PM -0500, Steven Rostedt wrote:
> On Fri, 4 Jan 2019 17:50:18 +
> Mark Rutland wrote:
>
> > At Linux Plumbers, I had a conversation with Steve Rostedt, and we came
> > to the conclusion that (withut heavyweight synchronization) patching two
> > NOPs at runtime
On Fri, 4 Jan 2019 17:50:18 +
Mark Rutland wrote:
> At Linux Plumbers, I had a conversation with Steve Rostedt, and we came
> to the conclusion that (withut heavyweight synchronization) patching two
> NOPs at runtime isn't safe, since a CPU might have executed the first
> NOP as a NOP before
Hi Torsten,
On Fri, Jan 04, 2019 at 03:10:53PM +0100, Torsten Duwe wrote:
> Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
> of each function. Replace the first NOP thus generated with a quick LR
> saver (move it to scratch reg x9), so the 2nd replacement insn, the call
> to
Use -fpatchable-function-entry (gcc8) to add 2 NOPs at the beginning
of each function. Replace the first NOP thus generated with a quick LR
saver (move it to scratch reg x9), so the 2nd replacement insn, the call
to ftrace, does not clobber the value. Ftrace will then generate the
standard stack fr
15 matches
Mail list logo
