Re: [PATCH akpm] mm: include VM_MIXEDMAP flag in the VM_SPECIAL list to avoid m(un)locking

[Rik van Riel <riel@redhat.com>]

On 02/16/2014 09:59 AM, Daniel Borkmann wrote:
> From: Vlastimil Babka <vbabka@suse.cz>

> This patch fixes the issue by adding VM_MIXEDMAP flag to VM_SPECIAL,
> a list of flags that make vma's non-mlockable and non-mergeable.
> The reasoning is that VM_MIXEDMAP vma's are similar to VM_PFNMAP,
> which is already on the VM_SPECIAL list, and both are intended
> for non-LRU pages where mlocking makes no sense anyway. Related
> Lkml discussion can be found in [2].
> 
>  [1] tools/testing/selftests/net/psock_tpacket
>  [2] https://lkml.org/lkml/2014/1/10/427
> 
> Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
> Reported-by: Daniel Borkmann <dborkman@redhat.com>
> Tested-by: Daniel Borkmann <dborkman@redhat.com>
> Cc: Thomas Hellstrom <thellstrom@vmware.com>
> Cc: John David Anglin <dave.anglin@bell.net>
> Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
> Cc: Carsten Otte <cotte@de.ibm.com>
> Cc: Jared Hulbert <jaredeh@gmail.com>
> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: <stable@vger.kernel.org> [3.11.x+]

Acked-by: Rik van Riel <riel@redhat.com>

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