Re: [PATCH v2] mm/damon/dbgfs: avoid duplicate context directory creation

[Bagas Sanjaya <bagasdotme@gmail.com>]

On 8/20/22 00:19, SeongJae Park wrote:
> From: Badari Pulavarty <badari.pulavarty@intel.com>
> 
> When user tries to create a DAMON context via the DAMON debugfs
> interface with a name of an already existing context, the context
> directory creation silently fails but the context is added in the
> internal data structure.  As a result, memory could leak and DAMON
> cannot be turned on.  An example test case is as below:
> 
>     # cd /sys/kernel/debug/damon/
>     # echo "off" >  monitor_on
>     # echo paddr > target_ids
>     # echo "abc" > mk_context
>     # echo "abc" > mk_context
>     # echo $$ > abc/target_ids
>     # echo "on" > monitor_on  <<< fails
> 
> This commit fixes the issue by checking if the name already exist and
> immediately returning '-EEXIST' in the case.
> 

Meh...

SJ, I have seen most (if not all of) your patches uses descriptive mood
instead of imperative. Better say "Fix the issue by checking ...".

-- 
An old man doll... just what I always wanted! - Clara