Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
This helps people who debug kernel with initramfs with minimal
environment (i.e. without coreutils or even busybox) or allow to open
sysfs file instead of run 'uname -m' in high level languages.
Signed-off-by: Petr Vorel <[email protected]>
---
Documentation/admin-guide/sysctl/kernel.rst | 5 +++++
kernel/utsname_sysctl.c | 7 +++++++
2 files changed, 12 insertions(+)
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
index ddccd1077462..70a0acf07101 100644
--- a/Documentation/admin-guide/sysctl/kernel.rst
+++ b/Documentation/admin-guide/sysctl/kernel.rst
@@ -65,6 +65,11 @@ combining the following values:
4 s3_beep
= =======
+arch
+====
+
+The machine hardware name, the same output as ``uname -m``
+(e.g. ``x86_64`` or ``aarch64``).
auto_msgmni
===========
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index 4ca61d49885b..7ffdd2cd5ff9 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -73,6 +73,13 @@ static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);
static struct ctl_table uts_kern_table[] = {
+ {
+ .procname = "arch",
+ .data = init_uts_ns.name.machine,
+ .maxlen = sizeof(init_uts_ns.name.machine),
+ .mode = 0444,
+ .proc_handler = proc_do_uts_string,
+ },
{
.procname = "ostype",
.data = init_uts_ns.name.sysname,
--
2.37.1
Hi all,
> Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
> This helps people who debug kernel with initramfs with minimal
> environment (i.e. without coreutils or even busybox) or allow to open
> sysfs file instead of run 'uname -m' in high level languages.
> Signed-off-by: Petr Vorel <[email protected]>
> ---
Changes v1->v2:
* Add file into /proc/sys/kernel/ (previously it was in
/sys/devices/system/cpu/). There are
* Update Documentation/ABI/ (Greg)
Kind regards,
Petr
> Documentation/admin-guide/sysctl/kernel.rst | 5 +++++ kernel/utsname_sysctl.c
> | 7 +++++++ 2 files changed, 12 insertions(+)
> diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst
> index ddccd1077462..70a0acf07101 100644
> --- a/Documentation/admin-guide/sysctl/kernel.rst
> +++ b/Documentation/admin-guide/sysctl/kernel.rst
> @@ -65,6 +65,11 @@ combining the following values:
> 4 s3_beep
> = =======
> +arch
> +====
> +
> +The machine hardware name, the same output as ``uname -m``
> +(e.g. ``x86_64`` or ``aarch64``).
> auto_msgmni
> ===========
> diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
> index 4ca61d49885b..7ffdd2cd5ff9 100644
> --- a/kernel/utsname_sysctl.c
> +++ b/kernel/utsname_sysctl.c
> @@ -73,6 +73,13 @@ static DEFINE_CTL_TABLE_POLL(hostname_poll);
> static DEFINE_CTL_TABLE_POLL(domainname_poll);
> static struct ctl_table uts_kern_table[] = {
> + {
> + .procname = "arch",
> + .data = init_uts_ns.name.machine,
> + .maxlen = sizeof(init_uts_ns.name.machine),
> + .mode = 0444,
> + .proc_handler = proc_do_uts_string,
> + },
> {
> .procname = "ostype",
> .data = init_uts_ns.name.sysname,
On Fri, Jul 29, 2022 at 02:53:44PM +0200, Petr Vorel wrote:
> Hi all,
>
> > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
>
> > This helps people who debug kernel with initramfs with minimal
> > environment (i.e. without coreutils or even busybox) or allow to open
> > sysfs file instead of run 'uname -m' in high level languages.
>
> > Signed-off-by: Petr Vorel <[email protected]>
> > ---
>
> Changes v1->v2:
> * Add file into /proc/sys/kernel/ (previously it was in
> /sys/devices/system/cpu/). There are
Looks like this line ended too soon?
> * Update Documentation/ABI/ (Greg)
This looks good to me, I'll queue it up after the next -rc1 is out
unless someone objects.
greg k-h
Hi Greg,
> On Fri, Jul 29, 2022 at 02:53:44PM +0200, Petr Vorel wrote:
> > Hi all,
> > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
> > > This helps people who debug kernel with initramfs with minimal
> > > environment (i.e. without coreutils or even busybox) or allow to open
> > > sysfs file instead of run 'uname -m' in high level languages.
> > > Signed-off-by: Petr Vorel <[email protected]>
> > > ---
> > Changes v1->v2:
> > * Add file into /proc/sys/kernel/ (previously it was in
> > /sys/devices/system/cpu/). There are
> Looks like this line ended too soon?
OK, Friday. I'm sorry to be too abstracted today.
I was about to explain the reason - that there are other related files
osrelease, ostype.
> > * Update Documentation/ABI/ (Greg)
> This looks good to me, I'll queue it up after the next -rc1 is out
> unless someone objects.
Thanks!
Kind regards,
Petr
> greg k-h
> On Fri, Jul 29, 2022 at 02:53:44PM +0200, Petr Vorel wrote:
> > Hi all,
> > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
> > > This helps people who debug kernel with initramfs with minimal
> > > environment (i.e. without coreutils or even busybox) or allow to open
> > > sysfs file instead of run 'uname -m' in high level languages.
> > > Signed-off-by: Petr Vorel <[email protected]>
> > > ---
> > Changes v1->v2:
> > * Add file into /proc/sys/kernel/ (previously it was in
> > /sys/devices/system/cpu/). There are
> Looks like this line ended too soon?
> > * Update Documentation/ABI/ (Greg)
> This looks good to me, I'll queue it up after the next -rc1 is out
> unless someone objects.
Hi Greg,
gently ping just to make sure you didn't forget on it. I'm sorry if I overlooked
it (search in next tree and your git trees) or if you remember and are too busy
(fully understand).
Kind regards,
Petr
> greg k-h
On Wed, Aug 17, 2022 at 11:56:18AM +0200, Petr Vorel wrote:
> > On Fri, Jul 29, 2022 at 02:53:44PM +0200, Petr Vorel wrote:
> > > Hi all,
>
> > > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
>
> > > > This helps people who debug kernel with initramfs with minimal
> > > > environment (i.e. without coreutils or even busybox) or allow to open
> > > > sysfs file instead of run 'uname -m' in high level languages.
>
> > > > Signed-off-by: Petr Vorel <[email protected]>
> > > > ---
>
> > > Changes v1->v2:
> > > * Add file into /proc/sys/kernel/ (previously it was in
> > > /sys/devices/system/cpu/). There are
>
> > Looks like this line ended too soon?
>
> > > * Update Documentation/ABI/ (Greg)
>
> > This looks good to me, I'll queue it up after the next -rc1 is out
> > unless someone objects.
>
> Hi Greg,
>
> gently ping just to make sure you didn't forget on it. I'm sorry if I overlooked
> it (search in next tree and your git trees) or if you remember and are too busy
> (fully understand).
It's only been 2 days since -rc1 is out, and here's my todo queue right
now:
❯ mdfrm -c ~/mail/todo/
1733 messages in /home/gregkh/mail/todo/
It's in good company :)
thanks,
greg k-h
> On Wed, Aug 17, 2022 at 11:56:18AM +0200, Petr Vorel wrote:
> > > On Fri, Jul 29, 2022 at 02:53:44PM +0200, Petr Vorel wrote:
> > > > Hi all,
> > > > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
> > > > > This helps people who debug kernel with initramfs with minimal
> > > > > environment (i.e. without coreutils or even busybox) or allow to open
> > > > > sysfs file instead of run 'uname -m' in high level languages.
> > > > > Signed-off-by: Petr Vorel <[email protected]>
> > > > > ---
> > > > Changes v1->v2:
> > > > * Add file into /proc/sys/kernel/ (previously it was in
> > > > /sys/devices/system/cpu/). There are
> > > Looks like this line ended too soon?
> > > > * Update Documentation/ABI/ (Greg)
> > > This looks good to me, I'll queue it up after the next -rc1 is out
> > > unless someone objects.
> > Hi Greg,
> > gently ping just to make sure you didn't forget on it. I'm sorry if I overlooked
> > it (search in next tree and your git trees) or if you remember and are too busy
> > (fully understand).
> It's only been 2 days since -rc1 is out, and here's my todo queue right
> now:
> ❯ mdfrm -c ~/mail/todo/
> 1733 messages in /home/gregkh/mail/todo/
> It's in good company :)
Lol, thanks for info, I'm very sorry I was impatient.
Petr
> thanks,
> greg k-h
On Fri, Jul 29, 2022 at 02:51:41PM +0200, Petr Vorel wrote:
> Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
>
> This helps people who debug kernel with initramfs with minimal
> environment (i.e. without coreutils or even busybox) or allow to open
> sysfs file instead of run 'uname -m' in high level languages.
>
> Signed-off-by: Petr Vorel <[email protected]>
> ---
> Documentation/admin-guide/sysctl/kernel.rst | 5 +++++
> kernel/utsname_sysctl.c | 7 +++++++
> 2 files changed, 12 insertions(+)
Wait, why does the subject line say "drivers/base/cpu"? That's not a
file being touched in this commit at all, so this isn't for me to take
:(
thanks,
greg k-h
On Thu, Sep 01, 2022 at 05:47:03PM +0200, Petr Vorel wrote:
> Hi Greg,
>
> [ Cc Eric Biederman as the author of kernel/utsname_sysctl.c ]
>
> > On Fri, Jul 29, 2022 at 02:51:41PM +0200, Petr Vorel wrote:
> > > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
>
> > > This helps people who debug kernel with initramfs with minimal
> > > environment (i.e. without coreutils or even busybox) or allow to open
> > > sysfs file instead of run 'uname -m' in high level languages.
>
> > > Signed-off-by: Petr Vorel <[email protected]>
> > > ---
> > > Documentation/admin-guide/sysctl/kernel.rst | 5 +++++
> > > kernel/utsname_sysctl.c | 7 +++++++
> > > 2 files changed, 12 insertions(+)
>
> > Wait, why does the subject line say "drivers/base/cpu"? That's not a
> > file being touched in this commit at all, so this isn't for me to take
> > :(
>
> Thanks for info. My bad, I forget to update the subject.
> I can send v3 with corrected subject, but who is going to take this?
>
> $ ./scripts/get_maintainer.pl kernel/utsname_sysctl.c
> [email protected] (open list)
>
> There is listed Author: Eric Biederman, so is it him to Cc ?
Yeah, that would be best, or maybe Andrew?
Hi Greg,
[ Cc Eric Biederman as the author of kernel/utsname_sysctl.c ]
> On Fri, Jul 29, 2022 at 02:51:41PM +0200, Petr Vorel wrote:
> > Print the machine hardware name (UTS_MACHINE) in /proc/sys/kernel/arch.
> > This helps people who debug kernel with initramfs with minimal
> > environment (i.e. without coreutils or even busybox) or allow to open
> > sysfs file instead of run 'uname -m' in high level languages.
> > Signed-off-by: Petr Vorel <[email protected]>
> > ---
> > Documentation/admin-guide/sysctl/kernel.rst | 5 +++++
> > kernel/utsname_sysctl.c | 7 +++++++
> > 2 files changed, 12 insertions(+)
> Wait, why does the subject line say "drivers/base/cpu"? That's not a
> file being touched in this commit at all, so this isn't for me to take
> :(
Thanks for info. My bad, I forget to update the subject.
I can send v3 with corrected subject, but who is going to take this?
$ ./scripts/get_maintainer.pl kernel/utsname_sysctl.c
[email protected] (open list)
There is listed Author: Eric Biederman, so is it him to Cc ?
Kind regards,
Petr
> thanks,
> greg k-h