linux-kernel - Re: [PATCH 0/3] dm-verity: optionally use tasklets in dm-verity

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Message-ID: <YtrahFs5wgweeB7f@redhat.com>
Date:   Fri, 22 Jul 2022 13:12:36 -0400
From:   Mike Snitzer <snitzer@...nel.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Nathan Huckleberry <nhuck@...gle.com>,
        linux-kernel@...r.kernel.org, dm-devel@...hat.com,
        Alasdair Kergon <agk@...hat.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH 0/3] dm-verity: optionally use tasklets in dm-verity

On Fri, Jul 22 2022 at 12:41P -0400,
Christoph Hellwig <hch@...radead.org> wrote:

> We've been tying to kill off task lets for about 15 years.  I don't
> think adding new users will make you a whole lot of friends..

I don't have perspective on how serious that effort is. But ~2 years
ago DM introduced another consumer of tasklets in dm-crypt, see:
39d42fa96ba1 dm crypt: add flags to optionally bypass kcryptd workqueues

Given that, and other numerous users, is the effort to remove tasklets
valid? What is the alternative to tasklets?

Mike