linux-kernel - Re: [PATCH v3] powerpc/fadump: sysfs for fadump memory reservation

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Message-Id: <b3540b13-20f9-6995-831e-b7f88121fd1f@linux.ibm.com>
Date:   Tue, 27 Aug 2019 11:32:52 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Sourabh Jain <sourabhjain@...ux.ibm.com>
Cc:     corbet@....net, mahesh@...ux.vnet.ibm.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v3] powerpc/fadump: sysfs for fadump memory reservation



On 27/08/19 8:49 AM, Michael Ellerman wrote:
> Hari Bathini <hbathini@...ux.ibm.com> writes:
>> On 26/08/19 4:14 PM, Sourabh Jain wrote:
>>> On 8/26/19 3:46 PM, Sourabh Jain wrote:
>>>> On 8/26/19 3:29 PM, Hari Bathini wrote:
>>>>> On 10/08/19 11:29 PM, Sourabh Jain wrote:
>>>>>> Add a sys interface to allow querying the memory reserved by
>>>>>> fadump for saving the crash dump.
>>>>>>
>>>>>> Add an ABI doc entry for new sysfs interface.
>>>>>>    - /sys/kernel/fadump_mem_reserved
>>>>>>
>>>>>> Signed-off-by: Sourabh Jain <sourabhjain@...ux.ibm.com>
>>>>>> ---
>>>>>> Changelog:
>>>>>> v1 -> v2:
>>>>>>   - Added ABI doc for new sysfs interface.
>>>>>>
>>>>>> v2 -> v3:
>>>>>>   - Updated the ABI documentation.
>>>>>> ---
>>>>>>
>>>>>>  Documentation/ABI/testing/sysfs-kernel-fadump    |  6 ++++++
>>>>>
>>>>> Shouldn't this be Documentation/ABI/testing/sysfs-kernel-fadump_mem_reserved?
>>>
>>> How about documenting fadump_mem_reserved and other sysfs attributes suggested
>>> by you in a single file Documentation/ABI/testing/sysfs-kernel-fadump?
>>
>> I wouldn't mind that but please do check if it is breaking a convention..
> 
> AIUI a file named like that would hold the documentation for the files
> inside a directory called /sys/kernel/fadump.
> 
> And in fact that's probably where these files should live, rather than
> just dropped directly into /sys/kernel.
Michael, could that be corrected now by introducing new sysfs files for FADump in
/sys/kernel/fadump/.

Also, duplicating current /sys/kernel/fadump_* files as /sys/kernel/fadump/* files
& eventually dropping /sys/kernel/fadump_* files sometime later..

- Hari