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linux/arch/ia64
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Naoya Horiguchi 9dbfe4e4a6 hugetlb: restrict hugepage_migration_support() to x86_64 
commit c177c81e09 upstream.

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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2014-06-30 20:11:53 -07:00
..
configs ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
dig Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
hp ACPI and power management updates for 3.14-rc1 2014-01-24 15:51:02 -08:00
include [IA64] Wire up new sched_setattr and sched_getattr syscalls 2014-01-28 09:52:53 -08:00
kernel mm: fix GFP_THISNODE callers and clarify 2014-03-10 17:26:19 -07:00
kvm KVM: Use cond_resched() directly and remove useless kvm_resched() 2013-12-13 14:23:45 +01:00
lib Fix common misspellings 2011-03-31 11:26:23 -03:00
mm hugetlb: restrict hugepage_migration_support() to x86_64 2014-06-30 20:11:53 -07:00
oprofile Disintegrate asm/system.h for IA64 2012-03-28 18:30:02 +01:00
pci ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node 2013-11-14 23:14:43 +01:00
scripts scripts: change scripts to use system python instead of env 2010-02-02 14:33:56 +01:00
sn ia64/PCI: Use dev_is_pci() to identify PCI devices 2013-12-09 16:50:22 -07:00
uv ia64: change to new flag variables 2011-03-17 14:02:56 +01:00
install.sh kbuild: use INSTALLKERNEL to select customized installkernel script 2009-09-20 12:18:14 +02:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2014-01-24 17:17:30 -08:00
Kconfig.debug [PATCH] Move Kprobes and Oprofile to "Instrumentation Support" menu 2005-11-07 07:53:35 -08:00
Makefile ia64/xen: Remove Xen support for ia64 2013-12-10 16:11:07 -08:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00