Re: [PATCH 1/2] x86/mm: Give each mm a unique ID

[Greg Kroah-Hartman]

On Fri, Mar 02, 2018 at 01:32:09PM -0800, Tim Chen wrote:
> From: Andy Lutomirski <luto@xxxxxxxxxx>
> commit: f39681ed0f48498b80455095376f11535feea332
> 
> This adds a new variable to mmu_context_t: ctx_id.
> ctx_id uniquely identifies the mm_struct and will never be reused.
> 
> Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
> Reviewed-by: Nadav Amit <nadav.amit@xxxxxxxxx>
> Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Cc: Mel Gorman <mgorman@xxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Rik van Riel <riel@xxxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx
> Link: http://lkml.kernel.org/r/413a91c24dab3ed0caa5f4e4d017d87b0857f920.1498751203.git.luto@xxxxxxxxxx
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
> Signed-off-by: Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>
> ---
>  arch/x86/include/asm/mmu.h         | 15 +++++++++++++--
>  arch/x86/include/asm/mmu_context.h |  5 +++++
>  arch/x86/mm/tlb.c                  |  2 ++
>  3 files changed, 20 insertions(+), 2 deletions(-)
> 

Does not apply to 4.4.y :(

Can you provide a working backport for that tree?

thanks,

greg k-h