linux-kernel - Re: [RFC PATCH] vfs: dodge strlen() in vfs_readlink() when ->i

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Message-ID: <20241118154418.GH3387508@ZenIV>
Date: Mon, 18 Nov 2024 15:44:18 +0000
From: Al Viro <viro@...iv.linux.org.uk>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: Jan Kara <jack@...e.cz>, brauner@...nel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [RFC PATCH] vfs: dodge strlen() in vfs_readlink() when ->i_link
 is populated

On Mon, Nov 18, 2024 at 03:51:34PM +0100, Mateusz Guzik wrote:

> This is only 1.5% because of other weird slowdowns which don't need to
> be there, notably putname using atomics. If the other crap was already
> fixed it would be closer to 5%.

Describe your plans re putname(), please.  Because we are pretty much
certain to step on each other's toes here in the coming cycle.