linux-kernel - Re: perfmon trouble

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Date:   Mon, 11 Jun 2018 10:04:00 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Al Viro <viro@...iv.linux.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: perfmon trouble

On Mon, Jun 11, 2018 at 9:49 AM Matthew Wilcox <willy@...radead.org> wrote:
>
> The problem is that even oprofile on ia64 depends on perfmon.

Hmm? You can definitely enable ia64 support for oprofile even without perfmon.

Are you saying the end result isn't usable?

Because I'd be inclined to just remove CONFIG_PERFMON support, and see
if anybody even notices..

I'm not expecting a lot of people to do a lot of oprofile on ia64
anyway. It's a bit late to start optimizing things now.

Do people use perfmon still? Maybe. Maybe not. Perhaps we could just
mark it as broken in the Kconfig file for now, and see if somebody
says something?

               Linus