Stephen Rothwell wrote: > Hi all, > > Changes since 20091030: > Today's next tree failed to boot on a POWER 6 box with : ------------[ cut here ]------------ kernel BUG at mm/mmap.c:2135! Oops: Exception in kernel mode, sig: 5 [#2] SMP NR_CPUS=1024 NUMA pSeries Modules linked in: ibmvscsic scsi_transport_srp scsi_tgt scsi_mod NIP: c00000000014e30c LR: c00000000014e2f8 CTR: c00000000014db88 REGS: c0000000db703620 TRAP: 0700 Tainted: G D (2.6.32-rc5-autotest-next-20091102) MSR: 8000000000029032 CR: 24022442 XER: 2000000c TASK = c0000000db7f6fe0[76] 'init' THREAD: c0000000db700000 CPU: 1 GPR00: 0000000000000001 c0000000db7038a0 c000000000b19900 0000000000000000 GPR04: c0000000db406a40 000000000000000c c0000000fe10c370 c000000000bb2800 GPR08: 000000000000db40 0000000000000000 c0000000dfdc0e00 000000000000000c GPR12: 0000000044022442 c000000000bb2800 00000000ffffffff ffffffffffffffff GPR16: 0000000008430000 00000000003c0000 c0000000db703ea0 c0000000db569108 GPR20: c0000000db568908 0000000000000000 c0000000db703d60 0000000000000000 GPR24: 0000000000000001 0000000000040100 c0000000fe503580 c0000000db1ac180 GPR28: 0000000000000000 c000000000f812d0 c000000000a84f00 0000000000000000 NIP [c00000000014e30c] .exit_mmap+0x190/0x1b8 LR [c00000000014e2f8] .exit_mmap+0x17c/0x1b8 Call Trace: [c0000000db7038a0] [c00000000014e2f8] .exit_mmap+0x17c/0x1b8 (unreliable) [c0000000db703950] [c0000000000916cc] .mmput+0x54/0x164 [c0000000db7039e0] [c0000000000968d8] .exit_mm+0x17c/0x1a0 [c0000000db703a90] [c000000000098cb8] .do_exit+0x248/0x784 [c0000000db703b70] [c0000000000992a8] .do_group_exit+0xb4/0xe8 [c0000000db703c00] [c0000000000aca2c] .get_signal_to_deliver+0x3ec/0x478 [c0000000db703cf0] [c0000000000134ac] .do_signal+0x6c/0x31c [c0000000db703e30] [c000000000008b7c] do_work+0x24/0x28 Instruction dump: 7c8407b4 387d0018 4800ab11 60000000 939d0008 7fe3fb78 4bfffdbd 7c7f1b79 4082fff4 e81b00e8 3120ffff 7c090110 <0b000000> 382100b0 e8010010 eb61ffd8 ---[ end trace ec052ac77a8e7cb4 ]--- Fixing recursive fault but reboot is needed! mm/mmap.c:2135 corresponds to : BUG_ON(mm->nr_ptes > (FIRST_USER_ADDRESS+PMD_SIZE-1)>>PMD_SHIFT); 3:mon> di 0xc00000000014e300 c00000000014e300 e81b00e8 ld r0,232(r27) c00000000014e304 3120ffff addic r9,r0,-1 c00000000014e308 7c090110 subfe r0,r9,r0 c00000000014e30c 0b000000 tdnei r0,0 c00000000014e310 382100b0 addi r1,r1,176 c00000000014e314 e8010010 ld r0,16(r1) c00000000014e318 eb61ffd8 ld r27,-40(r1) c00000000014e31c 7c0803a6 mtlr r0 c00000000014e320 eb81ffe0 ld r28,-32(r1) c00000000014e324 eba1ffe8 ld r29,-24(r1) c00000000014e328 ebc1fff0 ld r30,-16(r1) c00000000014e32c ebe1fff8 ld r31,-8(r1) c00000000014e330 4e800020 blr c00000000014e334 fb21ffc8 std r25,-56(r1) c00000000014e338 7c0802a6 mflr r0 c00000000014e33c fb81ffe0 std r28,-32(r1) 3:mon> r R00 = 0000000000000001 R16 = 0000000030daf420 R01 = c0000000fae37a60 R17 = 0000000000000002 R02 = c000000000b19900 R18 = 0000000000000000 R03 = 0000000000000000 R19 = 0000000030d903b0 R04 = c0000000fabd8670 R20 = 0000000000000000 R05 = c000000000a4d600 R21 = 0000000000000000 R06 = 0000000000000003 R22 = 0000000000000000 R07 = c000000000bb2c00 R23 = 0000000030daf340 R08 = 000000000000fabd R24 = 0000000000000001 R09 = 0000000000000000 R25 = 00000fffc2402158 R10 = c0000000fffb2958 R26 = 00000fffb793df80 R11 = 0000000000000005 R27 = c0000000fa9aa580 R12 = 0000000044000442 R28 = 0000000000000000 R13 = c000000000bb2c00 R29 = c000000000fc12d0 R14 = 00000000ffffffff R30 = c000000000a84f00 R15 = ffffffffffffffff R31 = 0000000000000000 pc = c00000000014e30c .exit_mmap+0x190/0x1b8 lr = c00000000014e2f8 .exit_mmap+0x17c/0x1b8 msr = 8000000000029032 cr = 24000442 ctr = c0000000002f0cb0 xer = 000000002000000a trap = 700 3:mon> Have attached the boot log. Next tree for 20091030 worked fine. Thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India ---------------------------------