linux-kernel - Re: [PATCH] mm/cma_debug: show complete cma name in debugfs directories

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Message-Id: <20220810143102.595072879e4bae7f7c46e3e6@linux-foundation.org>
Date:   Wed, 10 Aug 2022 14:31:02 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Charan Teja Kalla <quic_charante@...cinc.com>
Cc:     <david@...hat.com>, <vbabka@...e.cz>, <quic_pkondeti@...cinc.com>,
        <minchan@...nel.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm/cma_debug: show complete cma name in debugfs
 directories

On Wed, 10 Aug 2022 22:58:05 +0530 Charan Teja Kalla <quic_charante@...cinc.com> wrote:

> Currently only 12 characters of the cma name is being used as the debug
> directories where as the cma name can be of length CMA_MAX_NAME(=64)
> characters. One side problem with this is having 2 cma's with first
> common 12 characters would end up in trying to create directories with
> same name and fails with -EEXIST thus can limit cma debug functionality.

I guess so.  There might be back-compatibility issues, but it's
debugfs...


> Also drop 'cma-' prefix for the cma debug directories as they are
> clearly evident that they are for cma debug through creating them in
> /sys/kernel/debug/cma/ path.

I guess so.  But please run `grep -r cma- Documentation'