Re: [RFC] Tight check of pfn_valid on sparsemem

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, 13 Jul 2010 16:34:17 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> wrote:

> Anyway, sparsemem is designed to be aligned to SECTION_SIZE of memmap.
> Please avoid adding new Spaghetti code without proper configs.
> Thanks,

Ok, I realized I misunderstand all. Arm doesn't unmap memmap but reuse the page
for memmap without modifing ptes. My routine only works when ARM uses sparsemem_vmemmap.
But yes, it isn't.

Hmm...How about using pfn_valid() for FLATMEM or avoid using SPARSEMEM ?
If you want conrols lower than SPARSEMEM, FLATMEM works better because ARM unmaps memmap.
What is the reason for SPARSEMEM ?

Thanks,
-Kame

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxxx  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>


[Index of Archives]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux]     [Linux OMAP]     [Linux MIPS]     [ECOS]     [Asterisk Internet PBX]     [Linux API]