On Sun, 2010-11-14 at 21:06 +0100, Andreas Florath wrote: > Package: linux-2.6 > Version: 2.6.32-27 > File: /boot/vmlinuz-2.6.32-5-amd64 > Severity: normal > > *** Please type your report below this line *** > After installation of four new disks and configuring RAID 6 using > those four disks, the kernel keeps crashing every some minutes. > When using programs which exercise the disk (like bonnie++) it only > takes seconds to get an Oops. [...] > Nov 14 18:50:10 peleus kernel: [ 989.048138] JBD2: Detected IO errors while flushing file data on dm-0-8 > Nov 14 18:50:14 peleus kernel: [ 992.624892] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 > Nov 14 18:50:14 peleus kernel: [ 992.625081] IP: [<ffffffff810b5799>] mempool_free+0x14/0x7e > Nov 14 18:50:14 peleus kernel: [ 992.625238] PGD 7a5be067 PUD 77886067 PMD 0 > Nov 14 18:50:14 peleus kernel: [ 992.625458] Oops: 0000 [#1] SMP > Nov 14 18:50:14 peleus kernel: [ 992.625613] last sysfs file: /sys/devices/virtual/block/dm-0/dm/name > Nov 14 18:50:14 peleus kernel: [ 992.625684] CPU 1 > Nov 14 18:50:14 peleus kernel: [ 992.625788] Modules linked in: ext4 jbd2 crc16 dm_mod loop snd_pcm snd_timer i2c_i801 i2c_core snd soundcore snd_page_alloc pcspkr evdev joydev button processor ext3 jbd mbcache raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 multipath linear md_mod sd_mod crc_t10dif usbhid hid usb_storage ahci libata uhci_hcd thermal scsi_mod e1000e ehci_hcd thermal_sys usbcore nls_base [last unloaded: scsi_wait_scan] > Nov 14 18:50:14 peleus kernel: [ 992.628146] Pid: 335, comm: md127_raid6 Tainted: G B 2.6.32-5-amd64 #1 X7SPA-HF [...] The 'B' taint flag above indicates that the kernel already ran into a serious error. We need to see the earlier error message beginning with 'BUG: Bad page ...' Also, please consider testing the system RAM using memtest86+. Ben. -- Ben Hutchings Once a job is fouled up, anything done to improve it makes it worse.
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