linux-kernel - Re: [Patch v2] lib: test get_count_order/long in test

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Message-ID: <CAHp75VcaDX8exWvTimzjwyLKjcKtaZyxugzWmnNMErvTZHDLQQ@mail.gmail.com>
Date:   Thu, 11 Jun 2020 10:25:07 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Wei Yang <richard.weiyang@...il.com>
Cc:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Christian Brauner <christian.brauner@...ntu.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [Patch v2] lib: test get_count_order/long in test_bitops.c

On Thu, Jun 11, 2020 at 1:06 AM Wei Yang <richard.weiyang@...il.com> wrote:
> On Wed, Jun 10, 2020 at 01:17:28PM +0300, Andy Shevchenko wrote:
> >On Wed, Jun 10, 2020 at 2:06 AM Wei Yang <richard.weiyang@...il.com> wrote:
> >> On Tue, Jun 09, 2020 at 12:16:49PM +0300, Andy Shevchenko wrote:
> >> >On Mon, Jun 08, 2020 at 10:31:12PM +0000, Wei Yang wrote:
> >> >> On Fri, Jun 05, 2020 at 05:16:29PM -0700, Andrew Morton wrote:
> >> >
> >> >...
> >> >
> >> >> The test on 64bit machine pass. Since I don't have a 32bit machine by hand,
> >> >
> >> >Out of curiosity what that machine is?
> >> >
> >>
> >> It is a Intel Xeon Gold CPU.
> >
> >I suppose it's x86 (and not ia64).
> >In this case you can always build an i386 configuration and test on a
> >32-bit "machine".
> >
>
> Yes, you are right. While last time I tried to run a 32bit guest, it took me a
> lot of time to setup. If my understanding is correct, to run on a 32bit
> machine, we not only need the kernel but a whole 32bit system. This means I
> need to re-install a 32bit system. And I found many distro doesn't support
> 32bit system any more.
>
> Do you have a better way to setup the environment?

Yes, BuildRoot is your friend. I have a branch [1] to make it suitable
to create bootable images for x86 machines. There is a quick
instructions what it does provide.

[1]: https://github.com/andy-shev/buildroot/tree/intel/board/intel/common

-- 
With Best Regards,
Andy Shevchenko