> GCC 10 appears to have changed -O2 in order to make compilation time
faster when using -flto, seemingly at the expense of performance, in
particular with regards to how the inliner works. Since -O3 these days
shouldn't have the same set of bugs as 10 years ago, this commit
defaults new kernel
On Sun, May 10, 2020 at 9:47 PM David Laight wrote:
>
> From: Joe Perches
> > Sent: 08 May 2020 16:06
> > On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > > Personally, I'm more interested in improving compile speed of the kernel
> >
> > Any opinion on precompiled header support?
>
>
From: Joe Perches
> Sent: 10 May 2020 18:45
>
> On Sun, 2020-05-10 at 12:47 +, David Laight wrote:
> > From: Joe Perches
> > > Sent: 08 May 2020 16:06
> > > On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > > > Personally, I'm more interested in improving compile speed of the kernel
On Sun, 2020-05-10 at 12:47 +, David Laight wrote:
> From: Joe Perches
> > Sent: 08 May 2020 16:06
> > On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > > Personally, I'm more interested in improving compile speed of the kernel
> >
> > Any opinion on precompiled header support?
>
>
From: Joe Perches
> Sent: 08 May 2020 16:06
> On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > Personally, I'm more interested in improving compile speed of the kernel
>
> Any opinion on precompiled header support?
When ever I've been anywhere near it it is always a disaster.
It may
On Fri, May 8, 2020 at 5:06 PM Joe Perches wrote:
>
> On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> > Personally, I'm more interested in improving compile speed of the kernel
>
> Any opinion on precompiled header support?
I have not tried it. IIRC precompiled headers usually work
On Fri, 2020-05-08 at 13:49 +0200, Arnd Bergmann wrote:
> Personally, I'm more interested in improving compile speed of the kernel
Any opinion on precompiled header support?
On Fri, May 8, 2020 at 2:07 PM Jason A. Donenfeld wrote:
> On Fri, May 8, 2020 at 5:56 AM Arnd Bergmann wrote:
>
> The other significant thing -- and what prompted this patchset -- is
> it looks like gcc 10 has lowered the inlining degree for -O2, and put
> gcc 9's inlining parameters from -O2
On Fri, May 8, 2020 at 5:56 AM Arnd Bergmann wrote:
>
> On Fri, May 8, 2020 at 1:33 PM Oleksandr Natalenko
> wrote:
> >
> > On Fri, May 08, 2020 at 05:21:47AM -0600, Jason A. Donenfeld wrote:
> > > > Should we untangle -O3 from depending on ARC first maybe?
> > >
> > > Oh, hah, good point. Yes,
On Fri, May 8, 2020 at 1:33 PM Oleksandr Natalenko wrote:
>
> On Fri, May 08, 2020 at 05:21:47AM -0600, Jason A. Donenfeld wrote:
> > > Should we untangle -O3 from depending on ARC first maybe?
> >
> > Oh, hah, good point. Yes, I'll do that for a v2, but will wait another
> > day for feedback
On Fri, May 08, 2020 at 05:21:47AM -0600, Jason A. Donenfeld wrote:
> > Should we untangle -O3 from depending on ARC first maybe?
>
> Oh, hah, good point. Yes, I'll do that for a v2, but will wait another
> day for feedback first.
Just keep in mind that my previous attempt [1] failed because of
On Fri, May 8, 2020 at 3:08 AM Oleksandr Natalenko wrote:
>
> Should we untangle -O3 from depending on ARC first maybe?
Oh, hah, good point. Yes, I'll do that for a v2, but will wait another
day for feedback first.
Jason
On Thu, May 07, 2020 at 04:45:30PM -0600, Jason A. Donenfeld wrote:
> GCC 10 appears to have changed -O2 in order to make compilation time
> faster when using -flto, seemingly at the expense of performance, in
> particular with regards to how the inliner works. Since -O3 these days
> shouldn't
On Thu, May 07, 2020 at 04:45:30PM -0600, Jason A. Donenfeld wrote:
> GCC 10 appears to have changed -O2 in order to make compilation time
> faster when using -flto, seemingly at the expense of performance, in
> particular with regards to how the inliner works. Since -O3 these days
> shouldn't
GCC 10 appears to have changed -O2 in order to make compilation time
faster when using -flto, seemingly at the expense of performance, in
particular with regards to how the inliner works. Since -O3 these days
shouldn't have the same set of bugs as 10 years ago, this commit
defaults new kernel
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