linux-kernel - Re: [PATCH 5.15 000/251] 5.15.47-rc2 review

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Message-ID: <20220615110022.yifrsvzxjsz2wky5@quack3.lan>
Date:   Wed, 15 Jun 2022 13:00:22 +0200
From:   Jan Kara <jack@...e.cz>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Thomas Backlund <tmb@....nu>, Jan Kara <jack@...e.cz>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shuah Khan <shuah@...nel.org>, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, Pavel Machek <pavel@...x.de>,
        Jon Hunter <jonathanh@...dia.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Slade Watkins <slade@...dewatkins.com>
Subject: Re: [PATCH 5.15 000/251] 5.15.47-rc2 review

On Tue 14-06-22 12:00:22, Linus Torvalds wrote:
> On Tue, Jun 14, 2022 at 11:51 AM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > Or just make sure that noop_backing_dev_info is fully initialized
> > before it's used.
> 
> I don't see any real reason why that
> 
>     err = bdi_init(&noop_backing_dev_info);
> 
> couldn't just be done very early. Maybe as the first call in
> driver_init(), before the whole devtmpfs_init() etc.

I've checked the dependencies and cgroups (which are the only non-trivial
dependency besides per-CPU infrastructure) are initialized early enough so
it should work fine. So let's try that.

								Honza
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR