[PATCH 0/6] convert locked_vm from unsigned long to atomic64_t

[Daniel Jordan]

On Wed, Apr 03, 2019 at 08:51:13AM -0400, Steven Sistare wrote:
> On 4/2/2019 4:41 PM, Daniel Jordan wrote:
> > [1] https://lore.kernel.org/linux-mm/20190211224437.25267-1-daniel.m.jordan@oracle.com/
> 
>   You could clean all 6 patches up nicely with a common subroutine that
> increases locked_vm subject to the rlimit.  Pass a bool arg that is true if
> the  limit should be enforced, !dma->lock_cap for one call site, and
> !capable(CAP_IPC_LOCK) for the rest.  Push the warnings and debug statements
> to the subroutine as well.  One patch could refactor, and a second could
> change the locking method.

Yes, I tried writing, but didn't end up including, such a subroutine for [1].
The devil was in the details, but with the cmpxchg business, it's more
worthwhile to iron all those out.  I'll give it a try.