linux-kernel - Re: [PATCH v6 1/6] Documentation/ABI: add ABI documentation for /sys/kernel/fadump

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Date:   Wed, 8 Jan 2020 01:36:54 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     Sourabh Jain <sourabhjain@...ux.ibm.com>, mpe@...erman.id.au
Cc:     mahesh@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
        linuxppc-dev@...abs.org, corbet@....net, linux-doc@...r.kernel.org,
        gregkh@...uxfoundation.org
Subject: Re: [PATCH v6 1/6] Documentation/ABI: add ABI documentation for
 /sys/kernel/fadump_*


On 11/12/19 9:39 PM, Sourabh Jain wrote:
> Add missing ABI documentation for existing FADump sysfs files.
> 
> Signed-off-by: Sourabh Jain <sourabhjain@...ux.ibm.com>

The patch series adds a new sysfs attribute that provides the amount of memory
reserved for FADump. It also streamlines FADump specific sysfs interfaces.
Thanks for looking into this.

For the series...

Reviewed-by: Hari Bathini <hbathini@...ux.ibm.com>

> ---
>  Documentation/ABI/testing/sysfs-kernel-fadump_enabled     | 7 +++++++
>  Documentation/ABI/testing/sysfs-kernel-fadump_registered  | 8 ++++++++
>  Documentation/ABI/testing/sysfs-kernel-fadump_release_mem | 8 ++++++++
>  .../ABI/testing/sysfs-kernel-fadump_release_opalcore      | 7 +++++++
>  4 files changed, 30 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-kernel-fadump_enabled
>  create mode 100644 Documentation/ABI/testing/sysfs-kernel-fadump_registered
>  create mode 100644 Documentation/ABI/testing/sysfs-kernel-fadump_release_mem
>  create mode 100644 Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore
> 
> diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_enabled b/Documentation/ABI/testing/sysfs-kernel-fadump_enabled
> new file mode 100644
> index 000000000000..f73632b1c006
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-kernel-fadump_enabled
> @@ -0,0 +1,7 @@
> +What:		/sys/kernel/fadump_enabled
> +Date:		Feb 2012
> +Contact:	linuxppc-dev@...ts.ozlabs.org
> +Description:	read only
> +		Primarily used to identify whether the FADump is enabled in
> +		the kernel or not.
> +User:		Kdump service
> diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_registered b/Documentation/ABI/testing/sysfs-kernel-fadump_registered
> new file mode 100644
> index 000000000000..dcf925e53f0f
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-kernel-fadump_registered
> @@ -0,0 +1,8 @@
> +What:		/sys/kernel/fadump_registered
> +Date:		Feb 2012
> +Contact:	linuxppc-dev@...ts.ozlabs.org
> +Description:	read/write
> +		Helps to control the dump collect feature from userspace.
> +		Setting 1 to this file enables the system to collect the
> +		dump and 0 to disable it.
> +User:		Kdump service
> diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_release_mem b/Documentation/ABI/testing/sysfs-kernel-fadump_release_mem
> new file mode 100644
> index 000000000000..9c20d64ab48d
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-kernel-fadump_release_mem
> @@ -0,0 +1,8 @@
> +What:		/sys/kernel/fadump_release_mem
> +Date:		Feb 2012
> +Contact:	linuxppc-dev@...ts.ozlabs.org
> +Description:	write only
> +		This is a special sysfs file and only available when
> +		the system is booted to capture the vmcore using FADump.
> +		It is used to release the memory reserved by FADump to
> +		save the crash dump.
> diff --git a/Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore b/Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore
> new file mode 100644
> index 000000000000..53313c1d4e7a
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-kernel-fadump_release_opalcore
> @@ -0,0 +1,7 @@
> +What:		/sys/kernel/fadump_release_opalcore
> +Date:		Sep 2019
> +Contact:	linuxppc-dev@...ts.ozlabs.org
> +Description:	write only
> +		The sysfs file is available when the system is booted to
> +		collect the dump on OPAL based machine. It used to release
> +		the memory used to collect the opalcore.
> 

-- 
- Hari