On Wed, Jul 10, 2019 at 04:42:43PM -0700, Nick Desaulniers wrote:
> 7e: 0f 85 00 00 00 00jne 0
>
> 0080: R_X86_64_PC32 __x86_indirect_thunk_r11-4
> 84: c3retq
>
> I've sent you the .o file off thread as well. Thanks for taking a
>
On Wed, Jul 10, 2019 at 4:22 PM Josh Poimboeuf wrote:
>
> On Sat, Jul 06, 2019 at 10:50:01AM -0500, Josh Poimboeuf wrote:
> > On Tue, Jul 02, 2019 at 11:58:27PM +0200, Thomas Gleixner wrote:
> > > platform-quirks.o:
> > >
> > > if (x86_platform.set_legacy_features)
> > > 74: 4c 8b 1d 0
On Sat, Jul 06, 2019 at 10:50:01AM -0500, Josh Poimboeuf wrote:
> On Tue, Jul 02, 2019 at 11:58:27PM +0200, Thomas Gleixner wrote:
> > platform-quirks.o:
> >
> > if (x86_platform.set_legacy_features)
> > 74: 4c 8b 1d 00 00 00 00mov0x0(%rip),%r11# 7b
> >
> > 7b: 4d
On Tue, Jul 02, 2019 at 11:58:27PM +0200, Thomas Gleixner wrote:
> platform-quirks.o:
>
> if (x86_platform.set_legacy_features)
> 74: 4c 8b 1d 00 00 00 00mov0x0(%rip),%r11# 7b
>
> 7b: 4d 85 dbtest %r11,%r11
> 7e: 0f 85 00 00 00 00 jne
Hi Nick,
That is good news; and I'll strive to read the email in more detail
in the morning when there is a better chance of me actually
understanding some of it :-)
But his here is something I felt needed clarification:
On Tue, Jul 02, 2019 at 01:53:51PM -0700, Nick Desaulniers wrote:
> Of in
On Tue, Jul 2, 2019 at 2:58 PM Thomas Gleixner wrote:
> On Tue, 2 Jul 2019, Nick Desaulniers wrote:
> > TL;DR
> > LLVM currently has a bug when unrolling loops containing asm goto and
> > we have a fix in hand.
> >
> > Conservatively, we can block loop unrolling when we see asm goto in a loop:
>
>
Nick,
On Tue, 2 Jul 2019, Nick Desaulniers wrote:
> On Tue, Jul 2, 2019 at 2:58 PM Thomas Gleixner wrote:
> > On Tue, 2 Jul 2019, Nick Desaulniers wrote:
>
> > > This causes objtool to not find any issues in
> > > arch/x86/kernel/cpu/mtrr/generic.o. I don't observe any duplication
> > > in the
Nick,
On Tue, 2 Jul 2019, Nick Desaulniers wrote:
> TL;DR
> LLVM currently has a bug when unrolling loops containing asm goto and
> we have a fix in hand.
>
> Conservatively, we can block loop unrolling when we see asm goto in a loop:
Makes sense in order to make progress.
> This causes obj
On Tue, Jul 2, 2019 at 3:07 PM Peter Zijlstra wrote:
>
>
> Hi Nick,
>
> That is good news; and I'll strive to read the email in more detail
> in the morning when there is a better chance of me actually
> understanding some of it :-)
>
> But his here is something I felt needed clarification:
>
> On
On Tue, Jul 2, 2019 at 3:20 PM Thomas Gleixner wrote:
>
> Nick,
>
> On Tue, 2 Jul 2019, Nick Desaulniers wrote:
> > On Tue, Jul 2, 2019 at 2:58 PM Thomas Gleixner wrote:
> > > On Tue, 2 Jul 2019, Nick Desaulniers wrote:
> >
> > > > This causes objtool to not find any issues in
> > > > arch/x86/ke
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