Re: [PATCH] 2.4.0 test 1 ac 7 -- the last fancy memory detection patch

[Jamie Lokier]

david parsons wrote:
> +Reclaim ACPI table memory (DANGEROUS)
> +CONFIG_E820_RECLAIM
> +  If you are not using ACPI (CONFIG_ACPI) on this machine, you can
> +  use this option to use ACPI tables as regular memory.  This is a
> +  dangerous option -- some people have reported that attempting to
> +  reclaim ACPI tables result in Linux crashing -- so only answer Y
> +  if you know what you are doing.

I think you can get filesystem corruption without any obvious crashes
for a while.  Note sure though -- my laptop's problem is a region
between LOWMEMSIZE and HIGH_MEMORY which it says is usable, but which
isn't in fact usable.

Have you considered adding Pavel's memory verify patch?  It simply
allocs all the pages after memory setup, writes a word to each, and then
frees them again.  That's enough to check for ROM pages -- which are the
cause of fs corruption.

-- Jamie