The following command oopsed. mdadm -G --bitmap=internal /dev/md0 The array is a two disk raid1 and hosts the root filesystem. Is it not possible/allowed to add a bitmap to an active/mounted array? [ 339.521575] scsi_verify_blk_ioctl: 662 callbacks suppressed [ 339.531128] mdadm: sending ioctl 1261 to a partition! [ 339.539999] mdadm: sending ioctl 1261 to a partition! [ 339.549504] mdadm: sending ioctl 1261 to a partition! [ 339.558273] mdadm: sending ioctl 1261 to a partition! [ 339.570764] md0: bitmap file is out of date (0 < 47) -- forcing full recovery [ 339.574628] mdadm: sending ioctl 800c0910 to a partition! [ 339.574635] mdadm: sending ioctl 800c0910 to a partition! [ 339.574646] mdadm: sending ioctl 1261 to a partition! [ 339.574650] mdadm: sending ioctl 1261 to a partition! [ 339.580825] mdadm: sending ioctl 800c0910 to a partition! [ 339.580832] mdadm: sending ioctl 800c0910 to a partition! [ 339.634433] created bitmap (1 pages) for device md0 [ 341.719752] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 [ 341.720673] IP: [<ffffffff81473cc0>] bitmap_endwrite+0x130/0x250 [ 341.720673] PGD 0 [ 341.720673] Oops: 0000 [#1] SMP [ 341.720673] CPU 1 [ 341.720673] Modules linked in: lockd it87 hwmon_vid ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter nf_conntrack_ipv4 nf_defrag_ipv4 xt_state ip6_tables nf_conntrack keyspan snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device microcode edac_core sp5100_tco snd_pcm edac_mce_amd i2c_piix4 r8169 k10temp mii serio_raw snd_timer snd soundcore snd_page_alloc shpchp uinput sunrpc raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx pata_acpi ata_generic raid0 raid1 firewire_ohci firewire_core crc_itu_t pata_atiixp mvsas libsas scsi_transport_sas wmi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan] [ 341.720673] [ 341.720673] Pid: 0, comm: swapper/1 Not tainted 3.2.9-1.fc16.x86_64 #1 Gigabyte Technology Co., Ltd. GA-MA790GPT-UD3H/GA-MA790GPT-UD3H [ 341.720673] RIP: 0010:[<ffffffff81473cc0>] [<ffffffff81473cc0>] bitmap_endwrite+0x130/0x250 [ 341.867091] RSP: 0018:ffff880227c43b90 EFLAGS: 00010046 [ 341.867091] RAX: 0000000000000000 RBX: ffff8802110edd00 RCX: 0000000000000000 [ 341.867091] RDX: 00000000000000a4 RSI: 00000000000008a4 RDI: 0000000000000000 [ 341.867091] RBP: ffff880227c43bf0 R08: 0000000000000000 R09: 000000000000000b [ 341.867091] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000001485d40 [ 341.867091] R13: ffff8802110edd3c R14: 0000000000000202 R15: 0000000000000008 [ 341.867091] FS: 00007fa3e76bd7c0(0000) GS:ffff880227c40000(0000) knlGS:0000000000000000 This is all I got over the serial console. --Larkin -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html