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Christian Borntraeger f0e51b233e s390/mm: fix CMMA vs KSM vs others ... commit a8f60d1fad upstream. On heavy paging with KSM I see guest data corruption. Turns out that KSM will add pages to its tree, where the mapping return true for pte_unused (or might become as such later). KSM will unmap such pages and reinstantiate with different attributes (e.g. write protected or special, e.g. in replace_page or write_protect_page)). This uncovered a bug in our pagetable handling: We must remove the unused flag as soon as an entry becomes present again. Signed-of-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>		History 2017-07-18 18:40:34 +01:00
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asm	s390/mm: fix CMMA vs KSM vs others	2017-07-18 18:40:34 +01:00
uapi/asm	s390: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO	2016-11-20 01:17:02 +00:00