Re: Debian abandoning armhf, Raspberry Pi OS - was Re: [PATCH v2] arm64: compat: Implement misalignment fixups formultiword loads
Debian ARM actually splits 3 ways: https://www.debian.org/ports/arm/
for armel, armhf, arm64. Raspbian still uses one version I think.
I had been using Raspbian for years until somebody there decided to
drop the LXDE/Openbox desktops with Bullseye. And they seem to be
using Debian now(?). I actually use a RPI ZeroW for doing audio
recording powered by a 18650 cell, but at the other end I have a few
RPI 3Bs, no need for arm64. So I took the path less trodden. Mostly
not bad (Debian armhf) but a few oddities like menu colors in Gimp are
mostly unreadable with the default theme.
On 7/15/22, Andrew M.A. Cater <firstname.lastname@example.org> wrote:
> On Fri, Jul 15, 2022 at 05:39:34AM -0400, gene heskett wrote:
>> On 7/15/22 04:04, LinAdmin wrote:
>> > Pi 4 has much more throughput in 32-bit modes but the so
>> > called experts of Debian decided to abandon it :-(
>> > On 14.07.22 03:52, Wookey wrote:
>> > > On 2022-07-01 15:53 +0200, Ard Biesheuvel wrote:
>> > > > The 32-bit ARM kernel implements fixups on behalf of user space
>> > > > when
>> > > > using LDM/STM or LDRD/STRD instructions on addresses that are not
>> > > > 32-bit
>> > > > aligned.
>> > > > This feature is one of the remaining impediments to being able to
>> > > > switch
>> > > > to 64-bit kernels on 64-bit capable hardware running 32-bit user
>> > > > space,
>> > > > so let's implement it for the arm64 compat layer as well.
>> I agree. So far, raspios is still available in armhf flavor, and for
>> heavy machinery with just a few microseconds to respond to an IRQ,
>> armhf builds are a given. LinuxCNC is such an application.
> Just a thought: you might want to check which "so called experts" you are
> calling out here. Wookey has been an expert at ARM for the last 15 years or
> more - he knows what he's talking about.
> Debian has *not* abandoned armhf - Debian is one of the last Linux
> distributions actively supporting 32 bit for ARM or Intel architectures.
> Raspberry Pi OS is **not** Debian. Strictly, it's very much on its own as a
> forkof Raspbian from Peter Green.
> For historical reasons, Raspbian and Raspberry Pi OS are the odd ones out
> their version of armhf - arm v6 plus hardware floating point originally,
> where everyone else had settled on arm v7 plus hardware floating point.
> LinuxCNC is probably supported by neither Debian nor Raspberry Pi OS.
> Finally, of course, it's useful for everyone to remember to be polite
> and considerate - Code of Conduct applies here as everywhere else on
> Debian's mailing lists.
> With every good wish, as ever,
> Andy Cater
Education is contagious.