ext2 directory size bug (?)

From: Steven Van Acker (deepstar@ulyssis.org)
Date: Wed Nov 29 2000 - 23:17:25 EST


It this is a known thing, please don't kill me...
Hmm, gonna try to follow the REPORTING-BUGS file here...

[1.] One line summary of the problem:

     directory size increases when adding 0-size files,
     but doesn't decrease when removing them.

[2.] Full description of the problem/report:

     when creating lots of 0-size files, the size of directory .
     increases but when you delete those files, the directory size
     doesn't decrease. the diskspace can only be freed when the
     directory in question is removed. I know it's a stupid
     bug/feature to report, but imagine someone creating lots of
     files in /tmp. on some systems I know, /tmp is a small partition,
     which would get filled up by that diskspace, and can only be
     removed by removing /tmp
     
[3.] Keywords (i.e., modules, networking, kernel):

     ext2 directory dir size

[4.] Kernel version (from /proc/version):

     Linux version 2.2.17 (root@warp) (gcc version 2.95.2 20000220
     (Debian GNU/Linux)) #1 Thu Nov 30 06:16:39 CET 2000

[5.] Output of Oops.. message (if applicable) with symbolic information
     resolved (see Documentation/oops-tracing.txt)

     No Oops message
     
[6.] A small shell script or example program which triggers the
     problem (if possible)

     #!/bin/bash
     
     cd /tmp;
     ls -ld .;
     for i in `seq 1 3000`; do touch AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA$i; done
     ls -ld .;
     rm AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA* ;
     ls -ld .;
          
[7.] Environment

[7.1.] Software (add the output of the ver_linux script here)

     Linux warp 2.2.17 #1 Thu Nov 30 06:16:39 CET 2000 i686 unknown
     Kernel modules 2.3.19
     Gnu C 2.95.2
     Binutils 2.10.91
     Linux C Library 2.1.95
     Dynamic linker ldd (GNU libc) 2.1.95
     Procps 2.0.6
     Mount 2.10o
     Net-tools 2.05
     Console-tools 0.2.3
     Sh-utils 2.0i
     Modules Loaded au8820
     
[7.2.] Processor information (from /proc/cpuinfo):

     processor : 0
     vendor_id : GenuineIntel
     cpu family : 6
     model : 6
     model name : Celeron (Mendocino)
     stepping : 5
     cpu MHz : 434.325
     cache size : 128 KB
     fdiv_bug : no
     hlt_bug : no
     sep_bug : no
     f00f_bug : no
     coma_bug : no
     fpu : yes
     fpu_exception : yes
     cpuid level : 2
     wp : yes
     flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr
     bogomips : 865.08
     
[7.3.] Module information (from /proc/modules):

     au8820 111120 3

[7.4.] SCSI information (from /proc/scsi/scsi)

     none

[7.5.] Other information that might be relevant to the problem
       (please look in /proc and include all information that you
       think to be relevant):

     my /tmp is on an ext2 partition

[X.] Other notes, patches, fixes, workarounds:

     I wish, but I have 0 kernel programming experience

--
"An ounce of prevention is worth a pound of purge."

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This archive was generated by hypermail 2b29 : Thu Nov 30 2000 - 21:00:23 EST