I would like to ask a question here. Do we need to have sparse even if
the physical memory is contiguous? All the recent exynos machines come
with physical banks without any holes, and I am thinking why not drop it
and use flat mem instead. With LPAE these sections sizes wont be useful,
and I dont like to keep different section sizes for different
configurations. Any suggestions/opinions are very much helpful to me.
Regards,
Subash
On Thursday 20 December 2012 01:14 PM, Tomasz Figa wrote:
Hi Olof,
On Thursday 20 of December 2012 11:56:59 Olof Johansson wrote:
Hi,
On Thu, Dec 20, 2012 at 11:03 AM, Kukjin Kim <kgene.kim@xxxxxxxxxxx>
wrote:
The size of memory bank should be under 256MB, because current
section size is 256MB on EXYNOS SoCs. This patch fixes it.
This makes no sense. You don't have to split up memory ranges, the
code should be made to handle it instead.
It's not Exynos code which causes the problem. Sparsemem initialization
relies on the fact that initial amount of structures to described memory
equals to maximum section size which is defined per arch (e.g.
ARCH_EXYNOS).
What's the actual bug caused by this? The description is vague.
The kernel panics early on NULL pointer dereference in memory
initialization.
Best regards,
Tomasz Figa
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