On Monday 21 May 2012 01:12:01 Alan Cox wrote:
...
> >>> BTW, apparently malloc(size, M_TEMP, M_NOWAIT) requests fail for size>
> >>> 1G, even at boot time. Any ideas how to circumvent that (8.3-STABLE,
> >>> amd64, 4G physical RAM)?
> >>
> >> I suspect that you need to increase the size of your k
On 05/20/2012 17:48, Marko Zec wrote:
On Sunday 20 May 2012 19:34:26 Alan Cox wrote:
...
In any case, I wish to be certain that a particular kmem virtual address
range is mapped to superpages - how can I enforce that at malloc time,
and / or find out later if I really got my kmem mapped to super
On Sunday 20 May 2012 19:34:26 Alan Cox wrote:
...
> > In any case, I wish to be certain that a particular kmem virtual address
> > range is mapped to superpages - how can I enforce that at malloc time,
> > and / or find out later if I really got my kmem mapped to superpages?
> > Perhaps vm_map_lo
vm.pmap.pde.demotions: 31
No, your conclusion is incorrect. These counts show that 543 superpage
mappings were created by promotion.
OK, that sounds promising. Does "created by promotion" count reflect
historic / cumulative stats, or is vm.pmap.pde.promotions the actual number
of superpages
historic / cumulative stats, or is vm.pmap.pde.promotions the actual number
of superpages active? Or should we subtract vm.pmap.pde.demotions from it to
get the current value?
yes substracting gives current value.
___
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On 05/20/2012 09:43, Marko Zec wrote:
On Sunday 20 May 2012 09:25:59 Alan Cox wrote:
On Sun, May 20, 2012 at 2:01 AM, Marko Zec wrote:
Hi all,
I'm playing with an algorithm which makes use of large contiguous blocks
of kernel memory (ranging from 1M to 1G in size), so it would be nice if
thos
On Sunday 20 May 2012 09:25:59 Alan Cox wrote:
> On Sun, May 20, 2012 at 2:01 AM, Marko Zec wrote:
> > Hi all,
> >
> > I'm playing with an algorithm which makes use of large contiguous blocks
> > of kernel memory (ranging from 1M to 1G in size), so it would be nice if
> > those could be somehow fo
On Sun, May 20, 2012 at 2:01 AM, Marko Zec wrote:
> Hi all,
>
> I'm playing with an algorithm which makes use of large contiguous blocks of
> kernel memory (ranging from 1M to 1G in size), so it would be nice if those
> could be somehow forcibly mapped to superpages. I was hoping that the VM
> s
Hi all,
I'm playing with an algorithm which makes use of large contiguous blocks of
kernel memory (ranging from 1M to 1G in size), so it would be nice if those
could be somehow forcibly mapped to superpages. I was hoping that the VM
system would automagically map (merge) contiguous 4k pages to
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