On Fri, 30 Oct 2020 at 04:22, Alexei Starovoitov
wrote:
>
> On Thu, Oct 29, 2020 at 05:28:11PM -0700, Nick Desaulniers wrote:
> >
> > We already know that -fno-asynchronous-unwind-tables get dropped,
> > hence this patch.
>
> On arm64 only. Not on x86
>
> > And we know -fomit-frame-pointer or
> >
On Thu, Oct 29, 2020 at 05:28:11PM -0700, Nick Desaulniers wrote:
>
> We already know that -fno-asynchronous-unwind-tables get dropped,
> hence this patch.
On arm64 only. Not on x86
> And we know -fomit-frame-pointer or
> -fno-omit-frame-pointer I guess gets dropped, hence your ask.
yep. th
On Thu, 29 Oct 2020 at 21:35, Segher Boessenkool
wrote:
>
> On Wed, Oct 28, 2020 at 10:57:45PM -0400, Arvind Sankar wrote:
> > On Wed, Oct 28, 2020 at 04:20:01PM -0700, Alexei Starovoitov wrote:
> > > All compilers have bugs. Kernel has bugs. What can go wrong?
>
> Heh.
>
> > +linux-toolchains. GC
On Wed, Oct 28, 2020 at 10:57:45PM -0400, Arvind Sankar wrote:
> On Wed, Oct 28, 2020 at 04:20:01PM -0700, Alexei Starovoitov wrote:
> > All compilers have bugs. Kernel has bugs. What can go wrong?
Heh.
> +linux-toolchains. GCC updated the documentation in 7.x to discourage
> people from using th
On Wed, Oct 28, 2020 at 6:15 PM Ard Biesheuvel wrote:
> Commit 3193c0836 ("bpf: Disable GCC -fgcse optimization for
> ___bpf_prog_run()") introduced a __no_fgcse macro that expands to a
> function scope __attribute__((optimize("-fno-gcse"))), to disable a
> GCC specific optimization that was causi
On Wed, Oct 28, 2020 at 04:20:01PM -0700, Alexei Starovoitov wrote:
> On Thu, Oct 29, 2020 at 12:10:52AM +0100, Ard Biesheuvel wrote:
> > On Wed, 28 Oct 2020 at 23:59, Alexei Starovoitov
> > wrote:
> > >
> > > On Wed, Oct 28, 2020 at 11:15:04PM +0100, Ard Biesheuvel wrote:
> > > > On Wed, 28 Oct 2
On Wed, 28 Oct 2020 at 23:59, Alexei Starovoitov
wrote:
>
> On Wed, Oct 28, 2020 at 11:15:04PM +0100, Ard Biesheuvel wrote:
> > On Wed, 28 Oct 2020 at 22:39, Alexei Starovoitov
> > wrote:
> > >
> > > On Wed, Oct 28, 2020 at 06:15:05PM +0100, Ard Biesheuvel wrote:
> > > > Commit 3193c0836 ("bpf: D
On Thu, Oct 29, 2020 at 12:10:52AM +0100, Ard Biesheuvel wrote:
> On Wed, 28 Oct 2020 at 23:59, Alexei Starovoitov
> wrote:
> >
> > On Wed, Oct 28, 2020 at 11:15:04PM +0100, Ard Biesheuvel wrote:
> > > On Wed, 28 Oct 2020 at 22:39, Alexei Starovoitov
> > > wrote:
> > > >
> > > > On Wed, Oct 28, 2
On Wed, Oct 28, 2020 at 11:15:04PM +0100, Ard Biesheuvel wrote:
> On Wed, 28 Oct 2020 at 22:39, Alexei Starovoitov
> wrote:
> >
> > On Wed, Oct 28, 2020 at 06:15:05PM +0100, Ard Biesheuvel wrote:
> > > Commit 3193c0836 ("bpf: Disable GCC -fgcse optimization for
> > > ___bpf_prog_run()") introduced
On Wed, 28 Oct 2020 at 22:39, Alexei Starovoitov
wrote:
>
> On Wed, Oct 28, 2020 at 06:15:05PM +0100, Ard Biesheuvel wrote:
> > Commit 3193c0836 ("bpf: Disable GCC -fgcse optimization for
> > ___bpf_prog_run()") introduced a __no_fgcse macro that expands to a
> > function scope __attribute__((opti
Commit 3193c0836 ("bpf: Disable GCC -fgcse optimization for
___bpf_prog_run()") introduced a __no_fgcse macro that expands to a
function scope __attribute__((optimize("-fno-gcse"))), to disable a
GCC specific optimization that was causing trouble on x86 builds, and
was not expected to have any posi
On Wed, Oct 28, 2020 at 06:15:05PM +0100, Ard Biesheuvel wrote:
> Commit 3193c0836 ("bpf: Disable GCC -fgcse optimization for
> ___bpf_prog_run()") introduced a __no_fgcse macro that expands to a
> function scope __attribute__((optimize("-fno-gcse"))), to disable a
> GCC specific optimization that
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