RFR: 8327114: Attach in Linux may have wrong behaviour when pid == ns_pid (Kubernetes debug container)

[Laurence Cable]

using pid to namespace comparison is IMO inappropriate/misleading what 
is being tested is the sharing of a common mount namespace, therefore 
the test should be comparing the "mnt" namespace ids.

Rgds

- Larry

On 5/2/24 3:22 AM, Sebastian Lövdahl wrote:
> On Thu, 2 May 2024 10:13:51 GMT, Sebastian Lövdahl <duke at openjdk.org> wrote:
>
>> 8327114: Attach in Linux may have wrong behaviour when pid == ns_pid (Kubernetes debug container)
> This is a first stab at fixing the regression introduced in #17628. There has been a bit of discussion in https://mail.openjdk.org/pipermail/serviceability-dev/2024-April/055317.html and https://mail.openjdk.org/pipermail/serviceability-dev/2024-May/055364.html about exactly how to solve it, but this first attempt requires quite few changes at least.
>
> -------------
>
> PR Comment: https://git.openjdk.org/jdk/pull/19055#issuecomment-2090105068