What a plight!!! memory has become soo cheap nowadays that I don't have less than 1GB system and difficult to find someone in my knowledge having less than 1 GB memory.
Although does this means that pages in FCOM will never have page fault? and if this is true is this the reason why we assign NULL to memory descriptor ( mm_struct ) for kernel threads?
Regards,
Piyush
On Tue, Jun 28, 2011 at 8:56 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx> wrote:
Hi :)
Thanks :) Well, sometimes I just feel hesitate to break into someone's
On Tue, Jun 28, 2011 at 17:49, Prabhu nath <gprabhunath@xxxxxxxxx> wrote:
> Dear Mulyadi,
>
> You are always an important character to jump in to any discussion and it
> will be our great pleasure.
else discussion.
> Please see inline for my views.
>
> On Tue, Jun 28, 2011 at 3:46 PM, Mulyadi Santosa <mulyadi.santosa@xxxxxxxxx>
> wrote:
> In a 3G/1G partition. 1G of Kernel virtual address space is divided intoGreat naming! You beat me on that aspect :)
> 896MB and 128 MB regions. I name them as
> Fixed Constant Offset mapped region (FCOM) - 0xC0000000 to 0xF8000000
> Dynamically Arbitrarily Mappable region (DAMR) - 0xF8000000 to 0xFFFFFFFF
PS: Once there was a patch to create 4:4 VM split written by Ingo
Molnar. It does maximize address space at the expense of full TLB
flush on every context switch. AFAIK it once included in Fedora core 2
or 3, but dropped afterward since it puts more negative impacts rather
than positive enhancement (in virtual memory management point of view)
--
regards,
Mulyadi Santosa
Freelance Linux trainer and consultant
blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com
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