Re: [PATCH iproute2] ip/netns: avoid redundant mounts

[David Ahern <dsahern@kernel.org>]

On 2/27/26 6:36 PM, Chen Linxuan wrote:
> On Sat, Feb 28, 2026 at 4:30 AM David Ahern <dsahern@kernel.org> wrote:
>>
>> On 2/24/26 6:21 PM, Chen Linxuan wrote:
>>>> with this patch I am still seeing 2 entries:
>>>>
>>>> $ sudo ./ip netns add blah
>>>> $ cat /proc/self/mountinfo  | grep blah
>>>> 337 92 0:4 net:[4026532418] /run/netns/blah rw shared:344 - nsfs nsfs rw
>>>> 338 28 0:4 net:[4026532418] /run/netns/blah rw shared:344 - nsfs nsfs rw
>>>
>>> It seems like your old `ip` might have create the /run/netns mount point.
>>> After remove all netns then umount /run/netns, and ip netns add blah again.
>>> You should see only one entries.
>>
>> Fair point. I no longer have the patch, so send it again and I will try
>> a test in a new VM.
> 
> Why has this patch been applied?
> https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=82c8b9fe511e6c503ef60c16eebc7a715c3189eb
> 
> What is going on here?
> 

ugh. my mistake after testing and noting the above; I did not drop the
commit. I'll re-test when I get some time.