Re: Fix random crashes in x86-64 swsusp

[Pavel Machek]

Hi!

> > Maybe we should memset freed memory to zero so such bugs are
> > prevented?
> 
> It would make sense to poison these pages, yes.  Zero would not be a good
> choice of value, actually - something like 0xbb would cause nice oopses if
> someone used a pointer which was backed by __init memory.
> 
> CONFIG_DEBUG_PAGEALLOC will pick up this sort of bug, but that's i386-only.

Few minutes after that I found out that x86-64 has similar mechanism
under CONFIG_INIT_DEBUG... it uses 0xcc.

I just wonder if it should be configurable, memset over 100KB is not
likely to be noticeable.
								Pavel
-- 
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