linux/arch/s390/mm
Naoya Horiguchi c177c81e09 hugetlb: restrict hugepage_migration_support() to x86_64
Currently hugepage migration is available for all archs which support
pmd-level hugepage, but testing is done only for x86_64 and there're
bugs for other archs.  So to avoid breaking such archs, this patch
limits the availability strictly to x86_64 until developers of other
archs get interested in enabling this feature.

Simply disabling hugepage migration on non-x86_64 archs is not enough to
fix the reported problem where sys_move_pages() hits the BUG_ON() in
follow_page(FOLL_GET), so let's fix this by checking if hugepage
migration is supported in vma_migratable().

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Miller <davem@davemloft.net>
Cc: <stable@vger.kernel.org>	[3.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-06-04 16:53:51 -07:00
..
Makefile s390/mem_detect: move memory detection code to mm folder 2013-05-02 15:50:22 +02:00
cmm.c s390: convert use of typedef ctl_table to struct ctl_table 2013-10-28 08:36:25 +01:00
dump_pagetables.c s390/mm: cleanup page table definitions 2013-08-22 12:20:06 +02:00
extable.c s390/exceptions: switch to relative exception table entries 2012-09-26 15:45:10 +02:00
extmem.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
fault.c s390: split TIF bits into CIF, PIF and TIF bits 2014-05-20 08:58:47 +02:00
gup.c s390/gup: handle zero nr_pages case correctly 2013-10-24 17:17:01 +02:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
init.c s390/mm,tlb: optimize TLB flushing for zEC12 2014-04-03 14:31:00 +02:00
maccess.c s390/uaccess: remove copy_from_user_real() 2014-02-24 17:14:00 +01:00
mem_detect.c s390/mm: Convert bootmem to memblock 2014-05-20 08:58:40 +02:00
mmap.c s390/mmap: randomize mmap base for bottom up direction 2013-11-13 12:09:08 +09:00
page-states.c s390/cmma: remove "cmma disable" code in case of dump again 2014-05-20 08:58:42 +02:00
pageattr.c s390/mm: do not initialize storage keys 2013-10-24 17:17:00 +02:00
pgtable.c At over 200 commits, covering almost all supported architectures, this 2014-06-04 08:47:12 -07:00
vmem.c s390/mm: Convert bootmem to memblock 2014-05-20 08:58:40 +02:00