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From:   Kenny Bian <kennybian@gmail.com>
Date:   Thu, 4 Feb 2021 20:01:42 -0800
Message-ID: <CAC9s0NbKkH+_Yh3EQbkX3AB1_VEJACL2JX2s44RmgGiiJK__uA@mail.gmail.com>
Subject: Re: How to disable cache?
To:     Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Cc:     "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
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Thanks Luiz.

We may disable the cache.

On Thu, Feb 4, 2021 at 8:52 AM Luiz Augusto von Dentz
<luiz.dentz@gmail.com> wrote:
>
> Hi Kenny,
>
> On Wed, Feb 3, 2021 at 9:20 PM Kenny Bian <kennybian@gmail.com> wrote:
> >
> > Hello,
> >
> > In "/etc/bluetooth/main.conf", there seems a way to disable the cache:
> > [GATT]
> > Cache = no
> >
> > What does exactly the "disable cache" mean? It means the
> > "/var/lib/bluetooth/[MAC_ADDRESS]/cache" folder won't be created?
>
> That means it won't cache any GATT attribute found when discovering,
> the cache folder has other information as well.
>
> > We tried to disable the cache by changing the
> > "/etc/bluetooth/main.conf". It seems the
> > "/var/lib/bluetooth/[MAC_ADDRESS]/cache" folder is still created even
> > if it was deleted.
> > However, we noticed that the "[Attributes]" section in
> > "/var/lib/bluetooth/[MAC_ADDRESS]/cache/[iPHONE_MAC]" file is gone.
> > Does it mean the "disable cache" is working? Does it mean the handles
> > used between the bluetooth and the mobile app won't be cached?
>
> Yes, that is the result of not caching anything.
>
> --
> Luiz Augusto von Dentz