linux-kernel - Re: [PATCH 1/2] lockref: speculatively spin waiting for the lock to be released

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Message-ID: <20240613185545.GI1629371@ZenIV>
Date: Thu, 13 Jun 2024 19:55:45 +0100
From: Al Viro <viro@...iv.linux.org.uk>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mateusz Guzik <mjguzik@...il.com>,
	Christian Brauner <brauner@...nel.org>, jack@...e.cz,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 1/2] lockref: speculatively spin waiting for the lock to
 be released

On Thu, Jun 13, 2024 at 11:43:05AM -0700, Linus Torvalds wrote:

>        seqcount_spinlock_t        d_seq;
> 
> because seqcount_spinlock_t has been entirely broken and went from
> being 4 bytes back when, to now being 64 bytes.

1ca7d67cf5d5 "seqcount: Add lockdep functionality to seqcount/seqlock structures"