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Date: Wed, 11 Feb 2026 13:13:17 +0100
From: Christian Brauner <brauner@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: linux-fsdevel@vger.kernel.org, 
	Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>, Jeff Layton <jlayton@kernel.org>, 
	Amir Goldstein <amir73il@gmail.com>, Josef Bacik <josef@toxicpanda.com>, 
	Aleksa Sarai <cyphar@cyphar.com>
Subject: Re: [PATCH 3/7] mount: add FSMOUNT_NAMESPACE
Message-ID: <20260211-eurem-rinnen-3569a208531b@brauner>
References: <20260122-work-fsmount-namespace-v1-0-5ef0a886e646@kernel.org>
 <20260122-work-fsmount-namespace-v1-3-5ef0a886e646@kernel.org>
 <ad810bc9-5755-416b-a810-5c1019b85b76@sirena.org.uk>
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In-Reply-To: <ad810bc9-5755-416b-a810-5c1019b85b76@sirena.org.uk>

On Wed, Feb 11, 2026 at 11:47:39AM +0000, Mark Brown wrote:
> On Thu, Jan 22, 2026 at 11:48:48AM +0100, Christian Brauner wrote:
> > Add FSMOUNT_NAMESPACE flag to fsmount() that creates a new mount
> > namespace with the newly created filesystem attached to a copy of the
> > real rootfs. This returns a namespace file descriptor instead of an
> > O_PATH mount fd, similar to how OPEN_TREE_NAMESPACE works for open_tree().
> 
> I'm seeing a regression in the LTP fsmount02 test in yesterday's -next
> on arm64 which bisect to this patch, the test reports some unexpected
> successes with logs like this:

Thanks. This is postponed until next cycle.