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Date:   Tue, 23 Feb 2021 11:55:50 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Jessica Yu <jeyu@...nel.org>, Christoph Hellwig <hch@....de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Miroslav Benes <mbenes@...e.cz>,
        Emil Velikov <emil.l.velikov@...il.com>
Subject: Re: [GIT PULL] Modules updates for v5.12

On Tue, Feb 23, 2021 at 10:42 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> I think there is something horribly wrong in my tree, and my build
> process is now about 30% slower. It went from 5+ minutes to 8+
> minutes. The main suspect would be some lack of parallelism.

I don't see quite what is wrong, but bisection is clear, and points
the finger at

    367948220fce "module: remove EXPORT_UNUSED_SYMBOL*"

which looks entirely trivial, but clearly isn't.

It's repeatable. That commit slows down my build hugely.

              Linus

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