Re: Recursive chmod/chown OOM kills box with 32MB RAM

[Edward Shishkin]

Denis Vlasenko wrote:

> 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@xxxxxxxxxxx, **
> ** 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
>  

would you try
reiserfsck -j /dev/sdc3 /dev/sdc3

Thanks,
Edward.
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