On 16.12.16 09:57:20, Hanjun Guo wrote: > Hi Robert, > > On 2016/12/15 23:39, Robert Richter wrote: > >I was going to do some measurements but my kernel crashes now with a > >page fault in efi_rtc_probe(): > > > >[ 21.663393] Unable to handle kernel paging request at virtual address 20251000 > >[ 21.663396] pgd = ffff000009090000 > >[ 21.663401] [20251000] *pgd=0000010ffff90003 > >[ 21.663402] , *pud=0000010ffff90003 > >[ 21.663404] , *pmd=0000000fdc030003 > >[ 21.663405] , *pte=00e8832000250707 > > > >The sparsemem config requires the whole section to be initialized. > >Your patches do not address this. > > This patch set is running properly on D05, both the boot and > LTP MM stress test are ok, seems it's a different configuration > of memory mappings in firmware, just a stupid question, which > part is related to this problem, is it only the Reserved memory? The problem are efi reserved regions that are no longer reserved but marked as nomap pages. Those are excluded from page initialization causing parts of a memory section not being initialized. -Robert -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>