On Mon, 19 Mar 2012 11:44:45 -0500 Larkin Lowrey <llowrey@xxxxxxxxxxxxxxxxx> wrote: > 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? It is. But it is busted. Either use an older mdadm (3.2.2 or earlier), or apply this patch http://neil.brown.name/git?p=md;a=commitdiff;h=4474ca42e2577563a919fd3ed782e2ec55bf11a2 which has been sent to Linus already and should appear in -stable kernels in a couple of weeks. NeilBrown diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index cdf36b1..239af9a 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1904,6 +1904,8 @@ location_store(struct mddev *mddev, const char *buf, size_t len) if (mddev->pers) { mddev->pers->quiesce(mddev, 1); rv = bitmap_create(mddev); + if (!rv) + rv = bitmap_load(mddev); if (rv) { bitmap_destroy(mddev); mddev->bitmap_info.offset = 0; > [ 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 [ 339.570764] md0: bitmap file is out of date (0 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
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