Re: [PATCH v4 4/4] Use 2GB memory block size on large-memory x86-64 systems

From: Yinghai Lu
Date: Mon Aug 24 2015 - 13:46:54 EST

On Fri, Aug 21, 2015 at 4:54 PM, Tony Luck <tony.luck@xxxxxxxxx> wrote:
> On Fri, Aug 21, 2015 at 1:50 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> Still stuff going on that I don't understand here. I increased the amount of
> mirrored memory in this machine which moved max_pfn to 0x7560000
> and probe_memory_block_size() picked 512MB as the memory_block_size,
> which seemed plausible.
> But my kernel still crashed during boot with this value. :-(
> Forcing the block size to 128M made the system boot.
> Maybe all the holes in the e820 map matter too (specifically the
> alignment of the holes)?

Then, what does the E820 look like?

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