On Thu, 2009-07-30 at 17:55 +0530, Sachin Sant wrote: > Sachin Sant wrote: > > next-20090728 worked fine. Last commit that changed > > arch/powerpc/mm/hugetlbpage.c was > > cb7f3f2d92d1b26c13e30e639b6ee4a78e9a3afa > > > > powerpc: Add memory management headers for new 64-bit BookE > > > > I will try reverting that commit and check if that helps. > Hi Ben, > > Reverting the above patch helped. The tests ran fine against the > patched kernel. But ofcourse that's not the solution :-) > > Here is some data from xmon that might help find the reason for > the failure. This is with today's next. Thanks. I'll have a look next week. I think when I changed the indices I may have forgotten to update something. Cheers, Ben. > : ------------[ 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 > -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
