Re: [Xen-devel] ACPI fixmap overflow

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 11/15/2016 02:45 PM, Andrew Cooper wrote:
> On 15/11/16 19:34, Boris Ostrovsky wrote:
>> In addition to running out of e820 entries on that large machine that
>> Alex was referring to in [0] he is also running out of ACPI fixmap space
>> while parsing MADT (the box has *lots* of processors). The
>> quick-and-dirty solution is to increase NUM_FIXMAP_ACPI_PAGES but I
>> wonder whether we should move to dynamic memory allocation.
> Why do we use fixmap anyway?  It doesn't look too hard to reorder
> vm_init() slightly higher, and be able to use ioremap() for all APCI tables.

Hmm... Let me see how possible this is. Just moving it up won't work
since heap allocator is initialized after ACPI tables.

-boris

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