Re: [PATCH Vx RESEND] mm,hugetlb: remove mlock ulimit for SHM_HUGETLB

[Andrew Morton <akpm@linux-foundation.org>]

On Tue, 7 Sep 2021 13:52:04 -0700 Mike Kravetz <mike.kravetz@oracle.com> wrote:

> On 9/4/21 12:54 AM, zhangyiru wrote:
> > remove mlock ulimit for SHM_HUGETLB
> > commit 21a3c273f88c9cbbaf7e ("mm, hugetlb: add thread name and pid to
> > SHM_HUGETLB mlock rlimit warning") marked this as deprecated in 2012,
> > but it is not deleted yet
> 
> A better commit to mention would be 2584e517320b ("mm: reintroduce and
> deprecate rlimit based access for SHM_HUGETLB").  IIUC, 21a3c273f88c just
> modified the log message.

I made that change to the changelog.

> There is nothing wrong with the code.  Adding Andrew and Michal on Cc:
> as I have little or no experience with removing deprecated
> features/code.  This certainly has been marked deprecated for a long
> time (since 2.6.31).

I'd have thought that emitting a nasty message for a decade would suffice.

>  However, I still see that message in log files on
> occasion.

However I appear to be wrong :(

A quick web search indicates that people were reporting this in 2020,
at least.  So I don't think we can remove it.

otoh, one report was against RHEL3 which went end-of-life in 2015.  So
perhaps some more research on this will end up making the justifiable.

I dunno, I'm just waffling.  Maybe just merge it and if someone
complains, they can't say they weren't warned!