I could not reproduce the panic. But there is one other data point is
when I tried to mount the /dev/md0 after file system installation it
failed to mount. Once the MD recover is done I was able to mount the
drive.
Thanks,
Marri
------- here is log-----
# mkfs.ext3 -b 65536 /dev/md0
Warning: blocksize 65536 not usable on most systems.
mke2fs 1.38 (30-Jun-2005)
Filesystem label=
OS type: Linux
Block size=65536 (log=6)
Fragment size=65536 (log=6)
471040 inodes, 468750 blocks
23437 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=536805376
8 block groups
65528 blocks per group, 65528 fragments per group
58880 inodes per group
Superblock backups stored on blocks:
65528, 196584, 327640, 458696
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 33 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
# mount -t ext3 /dev/md0 /mnt/tmpmnt/
EXT3-fs: invalid journal inode.
mount: mounting /dev/md0 on /mnt/tmpmnt/ failed: Invalid argument
# mount /dev/md0 /mnt/tmpmnt/
EXT3-fs: invalid journal inode.
EXT2-fs: corrupt root inode, run e2fsck
mount: mounting /dev/md0 on /mnt/tmpmnt/ failed: Invalid argument
# md: md0: recovery done.
RAID5 conf printout:
--- rd:4 wd:4
disk 0, o:1, dev:sda
disk 1, o:1, dev:sdb
disk 2, o:1, dev:sdc
disk 3, o:1, dev:sdd
#
# mount -t ext3 /dev/md0 /mnt/tmpmnt/
kjournald starting. Commit interval 5 seconds
EXT3 FS on md0, internal journal
EXT3-fs: mounted filesystem with ordered data mode.
# df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/ram0 63461 44131 19330 70% /
/dev/md0 29939456 525568 27913920 2% /mnt/tmpmnt
-----------
-----Original Message-----
From: NeilBrown [mailto:neilb@xxxxxxx]
Sent: Tuesday, June 23, 2009 11:56 PM
To: Tirumala Reddy Marri
Cc: linux-raid@xxxxxxxxxxxxxxx; Dan Williams
Subject: RE: RAID-5 creation crashes when files system installed while
recovery going on
On Wed, June 24, 2009 4:39 pm, Tirumala Reddy Marri wrote:
> My meaning of crash was kernel panic happens. BTW we have HW
acceleration
> to do the XOR calculations which uses ADMA driver model.
> Thanks,
> MArri
Is it possible to get details of this panic? A digital photo
of the screen perhaps?
NeilBrown
>
> ________________________________
>
> From: linux-raid-owner@xxxxxxxxxxxxxxx on behalf of NeilBrown
> Sent: Tue 6/23/2009 7:31 PM
> To: Tirumala Reddy Marri
> Cc: linux-raid@xxxxxxxxxxxxxxx
> Subject: Re: RAID-5 creation crashes when files system installed while
> recovery going on
>
>
>
> On Wed, June 24, 2009 8:35 am, Tirumala Reddy Marri wrote:
>> All,
>> I started RAID-5 creation using mdadm command. While recovery is
>> happening I tried to install file system . I see intermittent crash
.
>> And crash doesn't happen at fixed location. Any clue what could be
the
>> problem? How does the read/writes to MD driver handled while RAID-5
is
>> under building.
>
> Can you describe exactly what you mean by "crash" ??
>
> The raid5 driver normally has no problems handling writes while
> it is resyncing. It has a 'stripe_cache' which is used to
> synchronise regular IO with resync IO.
>
> NeilBrown
>
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