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SubjectRe: [PATCH 1/2] x86 boot: add E820_RESVD_KERN
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On Thu, 2008-06-26 at 00:25 -0700, Yinghai Lu wrote:
[...]
> > if (pfn >= limit_pfn)
> > @@ -977,7 +978,7 @@ u64 __init early_reserve_e820(u64 startt
> > return 0;
> >
> > addr = round_down(start + size - sizet, align);
> > - e820_update_range(addr, sizet, E820_RAM, E820_RESERVED);
> > + e820_update_range(addr, sizet, E820_RAM, E820_RESVD_KERN);
>
> this line is not needed.

Why? Memory reserved by early_rserved_e820 should not be saved during
hibernation? shoudl not be saved by kdump?

> > printk(KERN_INFO "update e820 for early_reserve_e820\n");
> > update_e820();
> >
> > @@ -1191,6 +1192,7 @@ void __init e820_reserve_resources(void)
> > res = alloc_bootmem_low(sizeof(struct resource) * e820.nr_map);
> > for (i = 0; i < e820.nr_map; i++) {
> > switch (e820.map[i].type) {
> > + case E820_RESVD_KERN:
> > case E820_RAM: res->name = "System RAM"; break;
> > case E820_ACPI: res->name = "ACPI Tables"; break;
> > case E820_NVS: res->name = "ACPI Non-volatile Storage"; break;
> >
> > --
>
> please move reserve_setup_data() from head.c/head64.c to setup32/64.c
> or merged setup.c

OK.

> also need to change reserve_early in reserve_setup_data to
> e820_update_range(,,E820_RAM, E820_RESEVED_EXTRA).

Does this means reserve_early() should be replaced by
e820_update_range()?

> calling reserve_setup_data() should around early_reserve_e820_mpc_new.

I think reserve_xxx should be called before first find_e820_area() to
minimize the possibility of conflict.

> we don't need early_res_to_e820.

Best Regards,
Huang Ying

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