WSL2-Linux-Kernel/arch/ia64/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 [PATCH] ia64: ioremap: check EFI for valid memory attributes 2006-03-26 08:56:54 -08:00
contig.c mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT 2014-01-21 16:19:44 -08:00
discontig.c mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT 2014-01-21 16:19:44 -08:00
extable.c [IA64] fix compile error in arch/ia64/mm/extable.c 2009-06-15 09:17:50 -07:00
fault.c arch: mm: pass userspace fault flag to generic fault handler 2013-09-12 15:38:01 -07:00
hugetlbpage.c hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-04 16:53:51 -07:00
init.c mm, show_mem: remove SHOW_MEM_FILTER_PAGE_COUNT 2014-01-21 16:19:44 -08:00
ioremap.c Add WB/UC check for early_ioremap 2013-03-19 16:14:52 -07:00
numa.c [IA64] Delete __cpuinit usage from all ia64 users 2013-06-24 15:44:27 -07:00
tlb.c IA64: drivers: remove __dev* attributes. 2013-01-03 15:57:13 -08:00