linux-kernel - Re: [PATCH v1 11/17] lib: add light-weight queuing mechanism.

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Message-Id: <20230911111333.4d1a872330e924a00acb905b@linux-foundation.org>
Date:   Mon, 11 Sep 2023 11:13:33 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Chuck Lever <cel@...nel.org>
Cc:     linux-nfs@...r.kernel.org, NeilBrown <neilb@...e.de>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        David Gow <davidgow@...gle.com>, linux-kernel@...r.kernel.org,
        Chuck Lever <chuck.lever@...cle.com>
Subject: Re: [PATCH v1 11/17] lib: add light-weight queuing mechanism.

On Mon, 11 Sep 2023 10:39:43 -0400 Chuck Lever <cel@...nel.org> wrote:

> lwq is a FIFO single-linked queue that only requires a spinlock
> for dequeueing, which happens in process context.  Enqueueing is atomic
> with no spinlock and can happen in any context.

What is the advantage of this over using one of the library
facilities which we already have?