Benjamin Herrenschmidt wrote:
Thanks. I'll have a look next week. I think when I changed the indices
I may have forgotten to update something.
Ben,
I can recreate this issue with today's next.
Let me know if i can help in any way to fix this issue.
Thanks
-Sachin
: ------------[ cut here ]------------
cpu 0x0: Vector: 700 (Program Check) at [c000000038923560]
pc: c0000000000486d4: .free_hugepte_range+0x68/0xa0
lr: c000000000048954: .hugetlb_free_pgd_range+0x248/0x38c
sp: c0000000389237e0
msr: 8000000000029032
current = 0xc00000003b1d7780
paca = 0xc000000001002400
pid = 2839, comm = readback
kernel BUG at /home/linux-2.6.31-rc4/arch/powerpc/include/asm/pgalloc.h:36!
enter ? for help
[c000000038923880] c000000000048954 .hugetlb_free_pgd_range+0x248/0x38c
[c000000038923970] c000000000165a48 .free_pgtables+0xa0/0x154
[c000000038923a30] c000000000167f78 .exit_mmap+0x13c/0x1cc
[c000000038923ae0] c0000000000997ec .mmput+0x68/0x14c
[c000000038923b70] c00000000009f1d4 .exit_mm+0x190/0x1b8
[c000000038923c20] c0000000000a16e8 .do_exit+0x214/0x784
[c000000038923d00] c0000000000a1d1c .do_group_exit+0xc4/0xf8
[c000000038923da0] c0000000000a1d7c .SyS_exit_group+0x2c/0x48
[c000000038923e30] c0000000000085b4 syscall_exit+0x0/0x40
--- Exception: c01 (System Call) at 000000000fe15038
SP (ffb8e030) is in userspace
0:mon> e
cpu 0x0: Vector: 700 (Program Check) at [c000000038923560]
pc: c0000000000486d4: .free_hugepte_range+0x68/0xa0
lr: c000000000048954: .hugetlb_free_pgd_range+0x248/0x38c
sp: c0000000389237e0
msr: 8000000000029032
current = 0xc00000003b1d7780
paca = 0xc000000001002400
pid = 2839, comm = readback
kernel BUG at /home/linux-2.6.31-rc4/arch/powerpc/include/asm/pgalloc.h:36!
0:mon> r
R00 = 0000000000000001 R16 = 0000000000000000
R01 = c0000000389237e0 R17 = 0000000000000001
R02 = c000000000f165a8 R18 = 000000003fffffff
R03 = c0000000014504d0 R19 = 0000000000000000
R04 = c000000039390001 R20 = 0000000000000000
R05 = 0000000000000007 R21 = 0000010000000000
R06 = 0000000000000000 R22 = 0000000040000000
R07 = 0000000040000000 R23 = c0000000014504d0
R08 = c00000003d708188 R24 = 000000003fffffff
R09 = c00000003eb40000 R25 = 0000000000000007
R10 = c00000003d708188 R26 = c00000003ebd41b8
R11 = 0000000000000018 R27 = c0000000014504d0
R12 = 0000000040000448 R28 = c00000003eb40018
R13 = c000000001002400 R29 = 0000000000000008
R14 = 00000000ffffffff R30 = 0000000040000000
R15 = 00000000ffffffff R31 = c0000000389237e0
pc = c0000000000486d4 .free_hugepte_range+0x68/0xa0
lr = c000000000048954 .hugetlb_free_pgd_range+0x248/0x38c
msr = 8000000000029032 cr = 20042444
ctr = 800000000000b6f4 xer = 0000000000000001 trap = 700
0:mon>
Line 36 of arch/powerpc/include/asm/pgalloc.h corresponds to
BUG_ON(cachenum > PGF_CACHENUM_MASK);
May be something to do with number of elements in huge_pgtable_cache_name ??
Thanks
-Sachin
--
---------------------------------
Sachin Sant
IBM Linux Technology Center
India Systems and Technology Labs
Bangalore, India
---------------------------------
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