On Thu, 2011-11-10 at 18:09 -0800, Hugh Dickins wrote:

It was in this mail below, when Andrew sent Linus the patch, and Linus
opposed my "argument" in support: that wasn't on lkml or linux-mm,
but I don't see that its privacy needs protecting.

KOSAKI-san then sent instead a patch to correct some ints to longs,
which Linus did put in: but changing them to a new "vm_flags_t".

He was, I think, hoping that one of us would change all the other uses
of unsigned long vm_flags to vm_flags_t; but in fact none of us has
stepped up yet - yeah, we're still sulking that we didn't get our
shiny new 64-bit vm_flags ;)

I think Linus is not opposed to PowerPC and others defining a 64-bit
vm_flags_t if you need it, but wants not to bloat the x86_32 vma.

I'm still wary of the contortions we go to in constraining flags,
and feel that the 32-bit case holds back the 64-bit, which would
not itself be bloated at all.

The subject is likely to come up again, more pressingly, with page
flags.

Right, tho the good first step is to convert everything to vm_flags_t so
we can easily switch if we want to, even on a per-arch basis...

Oh well, now all we need is a volunteer :-)

Cheers,
Ben.


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