Re: [PATCH] mm/vmalloc: Fix regression caused by needless vmalloc_sync_all()

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On Fri, Nov 15, 2019 at 03:37:21PM -0800, Andrew Morton wrote:
> OK, thanks, here's what I queued.  Reviews, acks and testing, please??
> 
> From: Joerg Roedel <jroedel@xxxxxxx>
> Subject: x86/mm: Split vmalloc_sync_all()
> 
> Commit 3f8fd02b1bf1 ("mm/vmalloc: Sync unmappings in
> __purge_vmap_area_lazy()") introduced a call to vmalloc_sync_all() in the
> vunmap() code-path.  While this change was necessary to maintain
> correctness on x86-32-pae kernels, it also adds additional cycles for
> architectures that don't need it.

...

>  arch/x86/mm/fault.c      |   26 ++++++++++++++++++++++++--
>  drivers/acpi/apei/ghes.c |    2 +-
>  include/linux/vmalloc.h  |    5 +++--
>  kernel/notifier.c        |    2 +-
>  mm/nommu.c               |   10 +++++++---
>  mm/vmalloc.c             |   11 +++++++----
>  6 files changed, 43 insertions(+), 13 deletions(-)

Booting it looks ok here:

Tested-by: Borislav Petkov <bp@xxxxxxx>

-- 
Regards/Gruss,
    Boris.

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