Messages in this thread | | | Subject | Re: mtd: kernel BUG at arch/x86/mm/pat.c:279! | From | Suresh Siddha <> | Date | Sun, 09 Sep 2012 07:56:40 -0700 |
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On Sat, 2012-09-08 at 12:57 -0700, Linus Torvalds wrote: > Whatever. Something like this (TOTALLY UNTESTED) attached patch should > get the mtdchar overflows to go away,
It looks good to me. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Sasha, can you please give this a try?
> but it does *not* fix the fact > that the MTRR start/end model is broken. It really is technically > valid to have a resource_size_t range of 0xfffffffffffff000+0x1000, > and right now it causes a BUG_ON() in pat.c. > > Suresh?
yes but that is not a valid range I think because of the supported physical address bit limits of the processor and also the max architecture limit of 52 address bits.
I guess we should be checking for those limits in pat.c, especially bits above 52 are ignored by the HW and they can easily cause conflicting aliases with other valid regions. I will get back with a different patch to fix this.
thanks, suresh
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