Re: No more bits in vm_area_struct's vm_flags.

From: Nigel Cunningham
Date: Fri Sep 25 2009 - 04:34:34 EST


Hi.

KAMEZAWA Hiroyuki wrote:
>> I have some code in TuxOnIce that needs a bit too (explicitly mark the
>> VMA as needing to be atomically copied, for GEM objects), and am not
>> sure what the canonical way to proceed is. Should a new unsigned long be
>> added? The difficulty I see with that is that my flag was used in
>> shmem_file_setup's flags parameter (drm_gem_object_alloc), so that
>> function would need an extra parameter too..
>
> Hmm, how about adding vma->vm_flags2 ?

The difficulty there is that some functions pass these flags as arguments.

Regards,

Nigel
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