Hi Masami,
On Mon, Nov 2, 2020 at 5:27 PM Masami Hiramatsu wrote:
>
> Hi,
>
> On Fri, 30 Oct 2020 11:10:04 +0100
> Peter Zijlstra wrote:
>
> > On Fri, Oct 30, 2020 at 10:16:49AM +0100, Mark Wielaard wrote:
> > > Hi Namhyung,
> > >
> > > On Fri, Oct 30, 2020 at 02:26:19PM +0900, Namhyung Kim wrot
Hi,
On Fri, 30 Oct 2020 11:10:04 +0100
Peter Zijlstra wrote:
> On Fri, Oct 30, 2020 at 10:16:49AM +0100, Mark Wielaard wrote:
> > Hi Namhyung,
> >
> > On Fri, Oct 30, 2020 at 02:26:19PM +0900, Namhyung Kim wrote:
> > > On Thu, Oct 8, 2020 at 6:38 PM Mark Wielaard wrote:
> > > > GCC using -fvar
On Fri, Oct 30, 2020 at 10:16:49AM +0100, Mark Wielaard wrote:
> Hi Namhyung,
>
> On Fri, Oct 30, 2020 at 02:26:19PM +0900, Namhyung Kim wrote:
> > On Thu, Oct 8, 2020 at 6:38 PM Mark Wielaard wrote:
> > > GCC using -fvar-tracking and -fvar-tracking-assignments is pretty good
> > > at keeping tra
Hi Namhyung,
On Fri, Oct 30, 2020 at 02:26:19PM +0900, Namhyung Kim wrote:
> On Thu, Oct 8, 2020 at 6:38 PM Mark Wielaard wrote:
> > GCC using -fvar-tracking and -fvar-tracking-assignments is pretty good
> > at keeping track of where variables are held (in memory or registers)
> > when in the pro
Hello,
On Thu, Oct 8, 2020 at 6:38 PM Mark Wielaard wrote:
>
> Hi,
>
> On Thu, 2020-10-08 at 09:02 +0200, Peter Zijlstra wrote:
> > Some time ago, I had my intern pursue the other 2 approaches for
> > > symbolization. The one I see as most promising is by using the DWARF
> > > information (no BPF
* Mark Wielaard:
> On Sun, Oct 11, 2020 at 02:15:18PM +0200, Florian Weimer wrote:
>> * Mark Wielaard:
>>
>> > Yes, that would work. I don't know what the lowest supported GCC
>> > version is, but technically it was definitely fixed in 4.10.0, 4.8.4
>> > and 4.9.2. And various distros would proba
On Sun, Oct 11, 2020 at 02:15:18PM +0200, Florian Weimer wrote:
> * Mark Wielaard:
>
> > Yes, that would work. I don't know what the lowest supported GCC
> > version is, but technically it was definitely fixed in 4.10.0, 4.8.4
> > and 4.9.2. And various distros would probably have backported the
>
* Mark Wielaard:
> Yes, that would work. I don't know what the lowest supported GCC
> version is, but technically it was definitely fixed in 4.10.0, 4.8.4
> and 4.9.2. And various distros would probably have backported the
> fix. But checking for 5.0+ would certainly give you a good version.
>
> H
Hi!
On Sat, Oct 10, 2020 at 10:58:36PM +0200, Mark Wielaard wrote:
> On Thu, Oct 08, 2020 at 02:23:00PM -0700, Andi Kleen wrote:
> > So I guess could disable it for 5.0+ only.
>
> Yes, that would work. I don't know what the lowest supported GCC
> version is, but technically it was definitely fix
On Thu, Oct 08, 2020 at 02:23:00PM -0700, Andi Kleen wrote:
> > Basically you simply want to remove this line in the top-level
> > Makefile:
> >
> > DEBUG_CFLAGS:= $(call cc-option, -fno-var-tracking-assignments)
>
> It looks like this was needed as a workaround for a gcc bug that was there
>
On Sat, Oct 10, 2020 at 10:58:36PM +0200, Mark Wielaard wrote:
> Yes, that would work. I don't know what the lowest supported GCC
> version is, but technically it was definitely fixed in 4.10.0, 4.8.4
> and 4.9.2. And various distros would probably have backported the
> fix. But checking for 5.0+ w
> Basically you simply want to remove this line in the top-level
> Makefile:
>
> DEBUG_CFLAGS:= $(call cc-option, -fno-var-tracking-assignments)
It looks like this was needed as a workaround for a gcc bug that was there
from 4.5 to 4.9.
So I guess could disable it for 5.0+ only.
-Andi
Hi,
On Thu, 2020-10-08 at 09:02 +0200, Peter Zijlstra wrote:
> Some time ago, I had my intern pursue the other 2 approaches for
> > symbolization. The one I see as most promising is by using the DWARF
> > information (no BPF needed). The good news is that I believe we do not
> > need more informat
My appologies for adding a typo to the linux-kernel address, corrected
now.
On Wed, Oct 07, 2020 at 10:58:00PM -0700, Stephane Eranian wrote:
> Hi Peter,
>
> On Tue, Oct 6, 2020 at 6:17 AM Peter Zijlstra wrote:
> >
> > Hi all,
> >
> > I've been trying to float this idea for a fair number of ye
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