Mel Gorman af3e4aca47 powerpc: Do not assert pte_locked for hugepage PTE entries ... With CONFIG_DEBUG_VM, an assertion is made when changing the protection flags of a PTE that the PTE is locked. Huge pages use a different pagetable format and the assertion is bogus and will always trigger with a bug looking something like Unable to handle kernel paging request for data at address 0xf1a00235800006f8 Faulting instruction address: 0xc000000000034a80 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=32 NUMA Maple Modules linked in: dm_snapshot dm_mirror dm_region_hash dm_log dm_mod loop evdev ext3 jbd mbcache sg sd_mod ide_pci_generic pata_amd ata_generic ipr libata tg3 libphy scsi_mod windfarm_pid windfarm_smu_sat windfarm_max6690_sensor windfarm_lm75_sensor windfarm_cpufreq_clamp windfarm_core i2c_powermac NIP: c000000000034a80 LR: c000000000034b18 CTR: 0000000000000003 REGS: c000000003037600 TRAP: 0300 Not tainted (2.6.30-rc3-autokern1) MSR: 9000000000009032 <EE,ME,IR,DR> CR: 28002484 XER: 200fffff DAR: f1a00235800006f8, DSISR: 0000000040010000 TASK = c0000002e54cc740[2960] 'map_high_trunca' THREAD: c000000003034000 CPU: 2 GPR00: 4000000000000000 c000000003037880 c000000000895d30 c0000002e5a2e500 GPR04: 00000000a0000000 c0000002edc40880 0000005700000393 0000000000000001 GPR08: f000000011ac0000 01a00235800006e8 00000000000000f5 f1a00235800006e8 GPR12: 0000000028000484 c0000000008dd780 0000000000001000 0000000000000000 GPR16: fffffffffffff000 0000000000000000 00000000a0000000 c000000003037a20 GPR20: c0000002e5f4ece8 0000000000001000 c0000002edc40880 0000000000000000 GPR24: c0000002e5f4ece8 0000000000000000 00000000a0000000 c0000002e5f4ece8 GPR28: 0000005700000393 c0000002e5a2e500 00000000a0000000 c000000003037880 NIP [c000000000034a80] .assert_pte_locked+0xa4/0xd0 LR [c000000000034b18] .ptep_set_access_flags+0x6c/0xb4 Call Trace: [c000000003037880] [c000000003037990] 0xc000000003037990 (unreliable) [c000000003037910] [c000000000034b18] .ptep_set_access_flags+0x6c/0xb4 [c0000000030379b0] [c00000000014bef8] .hugetlb_cow+0x124/0x674 [c000000003037b00] [c00000000014c930] .hugetlb_fault+0x4e8/0x6f8 [c000000003037c00] [c00000000013443c] .handle_mm_fault+0xac/0x828 [c000000003037cf0] [c0000000000340a8] .do_page_fault+0x39c/0x584 [c000000003037e30] [c0000000000057b0] handle_page_fault+0x20/0x5c Instruction dump: 7d29582a 7d200074 7800d182 0b000000 3c004000 3960ffff 780007c6 796b00c4 7d290214 7929a302 1d290068 7d6b4a14 <800b0010> 7c000074 7800d182 0b000000 This patch fixes the problem by not asseting the PTE is locked for VMAs backed by huge pages. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>		2009-05-18 15:19:04 +10:00
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boot	Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-05-15 08:05:02 -07:00
configs	powerpc/8xx: Update defconfigs	2009-05-13 17:29:08 -05:00
include/asm	Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc	2009-05-15 08:05:02 -07:00
kernel	powerpc: Fix PCI ROM access	2009-05-15 16:43:42 +10:00
kvm	KVM: ppc: e500: Fix the bug that KVM is unstable in SMP	2009-03-24 11:03:15 +02:00
lib	Merge commit 'origin/master' into next	2009-03-11 17:10:07 +11:00
math-emu	powerpc/math-emu: Fix efp dependence	2009-03-11 06:00:08 -05:00
mm	powerpc: Do not assert pte_locked for hugepage PTE entries	2009-05-18 15:19:04 +10:00
oprofile	powerpc: Fix oprofile sampling of marked events on POWER7	2009-05-15 16:43:41 +10:00
platforms	Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block	2009-05-15 08:05:37 -07:00
sysdev	powerpc/mpic: Fix incorrect allocation of interrupt rev-map	2009-05-15 16:43:41 +10:00
xmon	powerpc: Prepare xmon_save_regs for use with kdump	2008-12-23 15:13:28 +11:00
Kconfig	Move dtc and libfdt sources from arch/powerpc/boot to scripts/dtc	2009-05-02 16:52:26 -07:00
Kconfig.debug	generic debug pagealloc: build fix	2009-04-02 19:04:48 -07:00
Makefile	powerpc/math-emu: Fix efp dependence	2009-03-11 06:00:08 -05:00