Re: [PATCH blktests] Fix _get_page_size()

[Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>]

On Jun 20, 2026 / 05:55, Bart Van Assche wrote:
> On 6/20/26 3:26 AM, Shin'ichiro Kawasaki wrote:
> > This is a rather fundamental change, so I would like to ask opinions from
> > other blktests users, especially Omar and Chaitanya. What do you think about
> > the idea to add getconf to the requirement list?
> 
> CONFIG_PAGE_SHIFT was introduced in the Linux kernel in February 2024
> (commit ba89f9c8ccba ("arch: consolidate existing CONFIG_PAGE_SIZE_*KB
> definitions")). Older kernels had CONFIG_PAGE_SIZE_4KB,
> CONFIG_PAGE_SIZE_16KB, etc. This means that it is possible to derive the
> kernel page size from the kernel configuration file for all upstream and
> distro kernels, isn't it?

I checked the commit is in the tag v6.9. My Debian bookworm system has kernel
v6.1, then the config file at /boot does not have CONFIG_PAGE_SHIFT as expected.
But it does not have CONFIG_PAGE_SIZE_* either... I'm still afraid that kernel
config file approach is not reliable.

$ uname -a
Linux testnode3 6.1.0-49-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.174-1 (2026-05-26) x86_64 GNU/Linux
$ grep PAGE_S /boot/config-6.1.0-49-amd64
CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
CONFIG_PAGE_SIZE_LESS_THAN_256KB=y