Re: [PATCH v4 01/13] mm/memblock: add MEMBLOCK_NOMAP attribute to memblock memory table

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Ard,

On Thu, Dec 03, 2015 at 11:55:53AM +0100, Ard Biesheuvel wrote:
> On 30 November 2015 at 13:28, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote:
> > This introduces the MEMBLOCK_NOMAP attribute and the required plumbing
> > to make it usable as an indicator that some parts of normal memory
> > should not be covered by the kernel direct mapping. It is up to the
> > arch to actually honor the attribute when laying out this mapping,
> > but the memblock code itself is modified to disregard these regions
> > for allocations and other general use.
> >
> > Cc: linux-mm@xxxxxxxxx
> > Cc: Alexander Kuleshov <kuleshovmail@xxxxxxxxx>
> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> > Reviewed-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
> > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> > ---
> >  include/linux/memblock.h |  8 ++++++
> >  mm/memblock.c            | 28 ++++++++++++++++++++
> >  2 files changed, 36 insertions(+)

[...]

> May I kindly ask team-mm/Andrew/Alexander to chime in here, and
> indicate whether you are ok with this patch going in for 4.5? If so,
> could you please provide your ack so the patch can be kept together
> with the rest of the series, which depends on it?

I'm keen to queue this in the arm64 tree, since it's a prerequisite for
cleaning up a bunch of our EFI code and sharing it with 32-bit ARM.

> I should note that this change should not affect any memblock users
> that never set the MEMBLOCK_NOMAP flag, but please, if you see any
> issues beyond 'this may conflict with other stuff we have queued for
> 4.5', please do let me know.

Indeed, I can't see that this would cause any issues, but I would really
like an Ack from one of the MM maintainers before taking this.

Please could somebody take a look?

Will
--
To unsubscribe from this list: send the line "unsubscribe linux-efi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Security]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux