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    SubjectRe: Recursive chmod/chown OOM kills box with 32MB RAM
    Date
    On Wednesday 01 February 2006 09:42, Denis Vlasenko wrote:
    > On Monday 30 January 2006 15:22, Chris Mason wrote:
    > > You can shrink the log of an existing filesystem. The minimum size is 513
    > > blocks, you might try 1024 as a good starting poing.
    > >
    > > reiserfstune -s 1024 /dev/xxxx
    > >
    > > The filesystem must be unmounted first.
    >
    > It doesn't want to, for no obvious reason:
    >
    > # mount
    > rootfs on / type rootfs (rw)
    > /dev/root on / type ext2 (ro,nogrpid)
    > none on /proc type proc (rw,nodiratime)
    > none on /sys type sysfs (rw)
    > none on /dev type ramfs (rw)
    > /dev/sda2 on /.share type ext2 (rw,noatime,nogrpid)
    > /dev/sdb2 on /.1 type reiserfs (rw,noatime)
    > /dev/sdc2 on /.2 type reiserfs (rw,noatime)
    > /dev/sdc3 on /.3 type reiserfs (rw,noatime)
    > /dev/sda2 on /.local type ext2 (rw,noatime,nogrpid)
    > none on /dev/pts type devpts (rw)
    > automount(pid1043) on /.local/mnt/auto type autofs (rw)
    > # umount /.3
    > umount: /.3: device is busy
    > # mount -o ro,remount /.3
    > # umount /.3
    > umount: /.3: device is busy
    > # reiserfstune /dev/sdc3
    > reiserfstune: Reiserfstune is not allowed to be run on mounted filesystem.
    > # lsof -nP | grep -F '/.3'
    > # lsof -nP | grep -F '/dev/sdc'

    Removed it from /etc/fstab, after reboot:

    # reiserfstune -s 1024 /dev/sdc3
    reiserfstune: Journal device has not been specified. Assuming journal is on the main device (/dev/sdc3).

    Current parameters:

    Filesystem state: consistent

    Reiserfs super block in block 16 on 0x823 of format 3.6 with standard journal
    Count of blocks on the device: 2094474
    Number of bitmaps: 64
    Blocksize: 4096
    Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 1019710
    Root block: 32941
    Filesystem is cleanly umounted
    Tree height: 4
    Hash function used to sort names: "r5"
    Objectid map size 54, max 972
    Journal parameters:
    Device [0x0]
    Magic [0x2cac04df]
    Size 8193 blocks (including 1 for journal header) (first block 18)
    Max transaction length 1024 blocks
    Max batch size 900 blocks
    Max commit age 30
    Blocks reserved by journal: 0
    Fs state field: 0x0:
    sb_version: 2
    inode generation number: 293892
    UUID: 7b3aa1ab-40bd-44da-98dc-b37b21f7add0
    LABEL:
    Set flags in SB:
    ATTRIBUTES CLEAN
    reiserfstune: Current journal parameters:
    Device [0x0]
    Magic [0x2cac04df]
    Size 8193 blocks (including 1 for journal header) (first block 18)
    Max transaction length 1024 blocks
    Max batch size 900 blocks
    Max commit age 30
    WARNING: wrong transaction max size (1024). Changed to 511
    reiserfstune: New journal parameters:
    Device [0x0]
    Magic [0x70dbc903]
    Size 1024 blocks (including 1 for journal header) (first block 18)
    Max transaction length 511 blocks
    Max batch size 449 blocks
    Max commit age 30
    Reiserfs super block in block 16 on 0x823 of format 3.6 with non-standard journal
    Count of blocks on the device: 2094474
    Number of bitmaps: 64
    Blocksize: 4096
    Free blocks (count of blocks - used [journal, bitmaps, data, reserved] blocks): 1019710
    Root block: 32941
    Filesystem is cleanly umounted
    Tree height: 4
    Hash function used to sort names: "r5"
    Objectid map size 54, max 972
    Journal parameters:
    Device [0x0]
    Magic [0x70dbc903]
    Size 1024 blocks (including 1 for journal header) (first block 18)
    Max transaction length 511 blocks
    Max batch size 449 blocks
    Max commit age 30
    Blocks reserved by journal: 8193
    Fs state field: 0x0:
    sb_version: 2
    inode generation number: 293892
    UUID: 7b3aa1ab-40bd-44da-98dc-b37b21f7add0
    LABEL:
    Set flags in SB:
    ATTRIBUTES CLEAN
    reiserfstune: ATTENTION: YOU ARE ABOUT TO SETUP THE NEW JOURNAL FOR THE "/dev/sdc3"!
    AREA OF "/dev/sdc3" DEDICATED FOR JOURNAL WILL BE ZEROED!
    Continue (y/n):y
    Initializing journal - 0%....20%....40%....60%....80%....100%
    Syncing..ok

    # mount /dev/sdc3 /.3 -o noatime
    mount: you must specify the filesystem type

    # dmesg | tail -4
    br: topology change detected, propagating
    br: port 1(ifi) entering forwarding state
    FAT: bogus number of reserved sectors
    VFS: Can't find a valid FAT filesystem on dev sdc3.

    # reiserfsck /dev/sdc3
    reiserfsck 3.6.11 (2003 www.namesys.com)

    *************************************************************
    ** If you are using the latest reiserfsprogs and it fails **
    ** please email bug reports to reiserfs-list@namesys.com, **
    ** providing as much information as possible -- your **
    ** hardware, kernel, patches, settings, all reiserfsck **
    ** messages (including version), the reiserfsck logfile, **
    ** check the syslog file for any related information. **
    ** If you would like advice on using this program, support **
    ** is available for $25 at www.namesys.com/support.html. **
    *************************************************************

    Will read-only check consistency of the filesystem on /dev/sdc3
    Will put log info to 'stdout'

    Do you want to run this program?[N/Yes] (note need to type Yes if you do):Yes
    Failed to open the journal device ((null)).

    Wow... 8(
    --
    vda
    -
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