linux-kernel - Re: PROBLEM: Duplicated entries in /proc/<pid>/mountinfo

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Message-Id: <DGCD3NMVHDJQ.2J8WVPEBM4ZRS@canonical.com>
Date: Wed, 11 Feb 2026 12:59:25 -0600
From: "Zachary M. Raines" <zachary.raines@...onical.com>
To: "Christian Brauner" <brauner@...nel.org>
Cc: "Alexander Viro" <viro@...iv.linux.org.uk>,
 <linux-fsdevel@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: PROBLEM: Duplicated entries in /proc/<pid>/mountinfo

On Thu Jan 29, 2026 at 1:04 PM CST, Zachary M. Raines wrote:
> On Thu Jan 29, 2026 at 8:28 AM CST, Christian Brauner wrote:
>> On Wed, Jan 28, 2026 at 08:49:12AM -0600, Zachary M. Raines wrote:
>> I suspect the issue is real though. I'm appending a patch as a proposed
>> fix. Can you test that and report back, please? I'm traveling tomorrow
>> so might take a little.

Just following up on the patch you sent and thanks again.

> Thank you for the quick turnaround on that patch. I applied it on top
> of 6.19-rc7 and after about 3 hrs I haven't seen any duplicates, in
> contrast to without the patch where they appear in under 10 minutes.
>
> Let me know if there's any other testing that would help.

According to my testing, your patch resolves the issue. Do you plan to
submit it upstream? Please let me know if there's anything
I can do to help on that front.

Best,
Zach