Sometimes we have serious problems with our Squid proxy server (it authenticates against an NT PDC using winbindd).
Jul 30 07:12:06 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:12:06 linprox kernel: failing address: 1010000 Jul 30 07:12:06 linprox kernel: CPU: 0 Jul 30 07:12:06 linprox kernel: Process squid (pid: 859, stackpage=045F7000) Jul 30 07:12:06 linprox kernel: Jul 30 07:12:06 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:12:06 linprox kernel: task: 045f6000 ksp: 045f7e80 pt_regs: 045f7f68 Jul 30 07:12:06 linprox kernel: User GPRS: Jul 30 07:12:06 linprox kernel: 00955f40 00000003 01010101 000dc6e8 Jul 30 07:12:06 linprox kernel: 01010101 4035cb50 00000000 7fffd4d8 Jul 30 07:12:06 linprox kernel: 01010101 00000000 00000000 7fffcde8 Jul 30 07:12:06 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcde8 Jul 30 07:12:06 linprox kernel: User ACRS: Jul 30 07:12:06 linprox squid[856]: Squid Parent: child process 859 exited due to signal 6 Jul 30 07:12:06 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:12:06 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:12:06 linprox last message repeated 2 times Jul 30 07:12:06 linprox kernel: User Code: Jul 30 07:12:06 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3430464 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3430392 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3430104 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429960 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429792 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429768 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429568 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429528 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429304 Jul 30 07:12:08 linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector 3429024 Jul 30 07:12:09 linprox squid[856]: Squid Parent: child process 1051 started Jul 30 07:12:36 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:12:36 linprox kernel: failing address: 1010000 Jul 30 07:12:36 linprox kernel: CPU: 0 Jul 30 07:12:36 linprox kernel: Process squid (pid: 1051, stackpage=03457000) Jul 30 07:12:36 linprox kernel: Jul 30 07:12:36 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:12:36 linprox kernel: task: 03456000 ksp: 03457cf8 pt_regs: 03457f68 Jul 30 07:12:36 linprox kernel: User GPRS: Jul 30 07:12:36 linprox kernel: 0091d208 00000003 01010101 000dc6e8 Jul 30 07:12:36 linprox kernel: 01010101 4035cb50 00000000 7fffd4d8 Jul 30 07:12:36 linprox kernel: 01010101 00000000 00000000 7fffcde8 Jul 30 07:12:36 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcde8 Jul 30 07:12:36 linprox kernel: User ACRS: Jul 30 07:12:36 linprox squid[856]: Squid Parent: child process 1051 exited due to signal 6 Jul 30 07:12:36 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:12:36 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:12:36 linprox last message repeated 2 times Jul 30 07:12:36 linprox kernel: User Code: Jul 30 07:12:36 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:12:39 linprox squid[856]: Squid Parent: child process 1175 started Jul 30 07:13:06 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:13:06 linprox kernel: failing address: 1010000 Jul 30 07:13:06 linprox kernel: CPU: 0 Jul 30 07:13:06 linprox kernel: Process squid (pid: 1175, stackpage=0298B000) Jul 30 07:13:06 linprox kernel: Jul 30 07:13:06 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:13:06 linprox kernel: task: 0298a000 ksp: 0298bcf8 pt_regs: 0298bf68 Jul 30 07:13:06 linprox kernel: User GPRS: Jul 30 07:13:06 linprox kernel: 00928bd0 00000003 01010101 000dc6e8 Jul 30 07:13:06 linprox kernel: 01010101 4035cb50 00000000 7fffd4d8 Jul 30 07:13:06 linprox kernel: 01010101 00000000 00000000 7fffcde8 Jul 30 07:13:06 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcde8 Jul 30 07:13:06 linprox kernel: User ACRS: Jul 30 07:13:06 linprox squid[856]: Squid Parent: child process 1175 exited due to signal 6 Jul 30 07:13:06 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:13:06 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:13:06 linprox last message repeated 2 times Jul 30 07:13:06 linprox kernel: User Code: Jul 30 07:13:06 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:25:06 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:25:06 linprox kernel: failing address: 1010000 Jul 30 07:25:06 linprox kernel: CPU: 0 Jul 30 07:25:06 linprox kernel: Process squid (pid: 3277, stackpage=03BFF000) Jul 30 07:25:06 linprox kernel: Jul 30 07:25:06 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:25:06 linprox kernel: task: 03bfe000 ksp: 03bffcf8 pt_regs: 03bfff68 Jul 30 07:25:06 linprox kernel: User GPRS: Jul 30 07:25:06 linprox kernel: 009cd668 00000003 01010101 000dc6e8 Jul 30 07:25:06 linprox kernel: 01010101 4035cb50 00000000 7fffd1b8 Jul 30 07:25:06 linprox kernel: 01010101 00000000 00000000 7fffcac8 Jul 30 07:25:06 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcac8 Jul 30 07:25:06 linprox kernel: User ACRS: Jul 30 07:25:06 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:25:06 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:25:06 linprox last message repeated 2 times Jul 30 07:25:06 linprox kernel: User Code: Jul 30 07:25:06 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:25:09 linprox squid[2694]: Squid Parent: child process 3522 started Jul 30 07:27:06 linprox squid[2694]: Squid Parent: child process 3522 exited due to signal 6 Jul 30 07:27:06 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:27:06 linprox kernel: failing address: 1010000 Jul 30 07:27:06 linprox kernel: CPU: 0 Jul 30 07:27:06 linprox kernel: Process squid (pid: 3522, stackpage=024B1000) Jul 30 07:27:06 linprox kernel: Jul 30 07:27:06 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:27:06 linprox kernel: task: 024b0000 ksp: 024b1cf8 pt_regs: 024b1f68 Jul 30 07:27:06 linprox kernel: User GPRS: Jul 30 07:27:06 linprox kernel: 00989fd0 00000003 01010101 000dc6e8 Jul 30 07:27:06 linprox kernel: 01010101 4035cb50 00000000 7fffd1b8 Jul 30 07:27:06 linprox kernel: 01010101 00000000 00000000 7fffcac8 Jul 30 07:27:06 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcac8 Jul 30 07:27:06 linprox kernel: User ACRS: Jul 30 07:27:06 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:27:06 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:27:06 linprox last message repeated 2 times Jul 30 07:27:06 linprox kernel: User Code: Jul 30 07:27:06 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:27:09 linprox squid[2694]: Squid Parent: child process 3758 started Jul 30 07:29:06 linprox squid[2694]: Squid Parent: child process 3758 exited due to signal 6 Jul 30 07:29:06 linprox kernel: User process fault: interruption code 0x10 Jul 30 07:29:06 linprox kernel: failing address: 1010000 Jul 30 07:29:06 linprox kernel: CPU: 0 Jul 30 07:29:06 linprox kernel: Process squid (pid: 3758, stackpage=06DDF000) Jul 30 07:29:06 linprox kernel: Jul 30 07:29:06 linprox kernel: User PSW: 070dd000 c02b601e Tainted: PF Jul 30 07:29:06 linprox kernel: task: 06dde000 ksp: 06ddfcf8 pt_regs: 06ddff68 Jul 30 07:29:06 linprox kernel: User GPRS: Jul 30 07:29:06 linprox kernel: 009650a8 00000003 01010101 000dc6e8 Jul 30 07:29:06 linprox kernel: 01010101 4035cb50 00000000 7fffd1b8 Jul 30 07:29:06 linprox kernel: 01010101 00000000 00000000 7fffcac8 Jul 30 07:29:06 linprox kernel: c03601ec c02b5ffc c02827ce 7fffcac8 Jul 30 07:29:06 linprox kernel: User ACRS: Jul 30 07:29:06 linprox kernel: 40177f60 00000000 00000000 00000000 Jul 30 07:29:06 linprox kernel: 00000000 00000000 00000000 00000000 Jul 30 07:29:06 linprox last message repeated 2 times Jul 30 07:29:06 linprox kernel: User Code: Jul 30 07:29:06 linprox kernel: bf 31 20 00 a7 84 00 1c a7 2a 00 01 18 32 14 31 a7 74 ff f8 Jul 30 07:29:09 linprox squid[2694]: Squid Parent: child process 3958 started This usually happens around 7ish or noonish. I asked about the "linprox kernel: end_request: I/O error, dev 5e:01 (dasd), sector " messages before, but the last response I received was "This is a known problem in the linux memory management code that only shows up on s390. You can probably find a detailed explanation in the mailing list archives. The good news is that the problem is completely harmless, except for filling up the system logger." I was curious, because these messages seem to increase during failures, and I am using the basevol+guestvol configuration. /dev/dasda1 is shared r/o across several images. This is RH 7.2 with a rebuilt 2.5.STABLE3. Any ideas? Thanks for any help, ~ Daniel ----------------------------------------------------------------------- This message is the property of Time Inc. or its affiliates. It may be legally privileged and/or confidential and is intended only for the use of the addressee(s). 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