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2.4.20 /proc/partitions corruption with many partitions

PATCH Nick Burrett 1 participant 1 message Jun 3, 2003

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Nick Burrett

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[resent with attachment this time]

Hi,

I'm finding it difficult to create more than, say 80, logical partitions on a server. The symptoms are that lvcreate keeps segfaulting. The reason is that /proc/partitions contains invalid data.

I initially wondered whether it might be the device naming convention since when we go above 26 logical paritions we start writing out lvm{, lvm}, lvm[ etc. so I added the following patch to write out the devices as digits but this didn't have any effect.

partitions/check.c 2003-06-03 14:43:19.000000000 +0100 renamed from partitions/check.c 2002-11-28 23:53:15.000000000 +0000 +1 -0
@@ -148,6 +148,7 @@ char *disk_name (struct gendisk *hd, int
                        maj = "hd";
                        break;
                case MD_MAJOR:
+               case LVM_BLK_MAJOR:
                        sprintf(buf, "%s%d", maj, unit);
                        return buf;
        }

This is quite easy to replicate, just create many logical volumes until lvcreate fails e.g.

$ lvcreate -L 10M -n foo01 vol01
etc.

The attached file is simply the output of:

$ cat /proc/partitions >/root/foo.txt

Any thoughts ?

Regards,

Nick.

   9     0    2048192 md0 0 0 0 0 0 0 0 0 0 0 0
   9     1   31744320 md1 0 0 0 0 0 0 0 0 0 0 0
   9     2    2048192 md2 0 0 0 0 0 0 0 0 0 0 0
   8     0   35843686 sda 968 3528 34954 6130 6375 16193 134440 38890 0 13090 45020
   8     1    2048256 sda1 918 3371 34312 4940 6066 8747 118912 38720 0 12770 43660
   8     2    2048287 sda2 3 0 24 20 1 0 8 0 0 20 20
   8     3   31744440 sda3 42 142 578 1160 308 7446 15520 170 0 290 1330
   8    16   35843686 sdb 1011 2866 29606 5580 6375 16193 134440 42130 0 11810 47710
   8    17    2048256 sdb1 958 2647 28822 4220 6066 8747 118912 41960 0 11470 46180
   8    18    2048287 sdb2 3 0 24 30 1 0 8 0 0 30 30
   8    19   31744440 sdb3 45 204 720 1310 308 7446 15520 170 0 340 1480

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# System wide environment and startup programs, for login setup # Functions and aliases go in /etc/bashrc

pathmunge () {
	if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
	   if [ "$2" = "after" ] ; then
	      PATH=$PATH:$1
	   else
	      PATH=$1:$PATH
	   fi
	fi
}

# Path manipulation
if [ id -u = 0 ]; then
pathmunge /sbin
pathmunge /usr/sbin
pathmunge /usr/local/sbin
fi

pathmunge /usr/X11R6/bin after

unset pathmunge

# No core files by default
ulimit -S -c 0 > /dev/null 2>&1

USER="id -un"
LOGNAME=$USER
MAIL="/var/spool/mail/$USER"

HOSTNAME=/bin/hostname
HISTSIZE=1000

if [ -z "$INPUTRC" -a ! -f "$HOME/.inputrc" ]; then
INPUTRC=/etc/inputrc
fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC

for i in /etc/profile.d/*.sh ; do

    if [ -r "$i" ]; then
    	. $i
    fi

done

unset i
major minor #blocks name rio rmerge rsect ruse wio wmerge wsect wuse running use aveq

  58     0    8388608 lvm0 0 0 0 0 0 0 0 0 0 0 0
  58     1      53248 lvm1 0 0 0 0 0 0 0 0 0 0 0
  58     2      53248 lvm2 0 0 0 0 0 0 0 0 0 0 0
  58     3      53248 lvm3 0 0 0 0 0 0 0 0 0 0 0
  58     4      53248 lvm4 0 0 0 0 0 0 0 0 0 0 0
  58     5      53248 lvm5 0 0 0 0 0 0 0 0 0 0 0
  58     6      53248 lvm6 0 0 0 0 0 0 0 0 0 0 0
  58     7      53248 lvm7 0 0 0 0 0 0 0 0 0 0 0
  58     8      53248 lvm8 0 0 0 0 0 0 0 0 0 0 0
  58     9      53248 lvm9 0 0 0 0 0 0 0 0 0 0 0
  58    10      53248 lvm10 0 0 0 0 0 0 0 0 0 0 0
  58    11      53248 lvm11 0 0 0 0 0 0 0 0 0 0 0
  58    12      53248 lvm12 0 0 0 0 0 0 0 0 0 0 0
  58    13      53248 lvm13 0 0 0 0 0 0 0 0 0 0 0
  58    14      53248 lvm14 0 0 0 0 0 0 0 0 0 0 0
  58    15      53248 lvm15 0 0 0 0 0 0 0 0 0 0 0
  58    16      53248 lvm16 0 0 0 0 0 0 0 0 0 0 0
  58    17      53248 lvm17 0 0 0 0 0 0 0 0 0 0 0
  58    18      53248 lvm18 0 0 0 0 0 0 0 0 0 0 0
  58    19      53248 lvm19 0 0 0 0 0 0 0 0 0 0 0
  58    20      53248 lvm20 0 0 0 0 0 0 0 0 0 0 0
  58    21      53248 lvm21 0 0 0 0 0 0 0 0 0 0 0
  58    22      53248 lvm22 0 0 0 0 0 0 0 0 0 0 0
  58    23      53248 lvm23 0 0 0 0 0 0 0 0 0 0 0
  58    24      53248 lvm24 0 0 0 0 0 0 0 0 0 0 0
  58    25      53248 lvm25 0 0 0 0 0 0 0 0 0 0 0
  58    26      53248 lvm26 0 0 0 0 0 0 0 0 0 0 0
  58    27      53248 lvm27 0 0 0 0 0 0 0 0 0 0 0
  58    28      53248 lvm28 0 0 0 0 0 0 0 0 0 0 0
  58    29      53248 lvm29 0 0 0 0 0 0 0 0 0 0 0
  58    30      53248 lvm30 0 0 0 0 0 0 0 0 0 0 0
  58    31      53248 lvm31 0 0 0 0 0 0 0 0 0 0 0
  58    32      53248 lvm32 0 0 0 0 0 0 0 0 0 0 0
  58    33      53248 lvm33 0 0 0 0 0 0 0 0 0 0 0
  58    34      53248 lvm34 0 0 0 0 0 0 0 0 0 0 0
  58    35      53248 lvm35 0 0 0 0 0 0 0 0 0 0 0
  58    36      53248 lvm36 0 0 0 0 0 0 0 0 0 0 0
  58    37      53248 lvm37 0 0 0 0 0 0 0 0 0 0 0
  58    38      53248 lvm38 0 0 0 0 0 0 0 0 0 0 0
  58    39      53248 lvm39 0 0 0 0 0 0 0 0 0 0 0
  58    40      53248 lvm40 0 0 0 0 0 0 0 0 0 0 0
  58    41      53248 lvm41 0 0 0 0 0 0 0 0 0 0 0
  58    42      53248 lvm42 0 0 0 0 0 0 0 0 0 0 0
  58    43      53248 lvm43 0 0 0 0 0 0 0 0 0 0 0
  58    44      53248 lvm44 0 0 0 0 0 0 0 0 0 0 0
  58    45      53248 lvm45 0 0 0 0 0 0 0 0 0 0 0
  58    46      53248 lvm46 0 0 0 0 0 0 0 0 0 0 0
  58    47      53248 lvm47 0 0 0 0 0 0 0 0 0 0 0
  58    48      53248 lvm48 0 0 0 0 0 0 0 0 0 0 0
  58    49      53248 lvm49 0 0 0 0 0 0 0 0 0 0 0
  58    50      53248 lvm50 0 0 0 0 0 0 0 0 0 0 0
  58    51      53248 lvm51 0 0 0 0 0 0 0 0 0 0 0
  58    52      53248 lvm52 0 0 0 0 0 0 0 0 0 0 0
  58    53      53248 lvm53 0 0 0 0 0 0 0 0 0 0 0
  58    54      53248 lvm54 0 0 0 0 0 0 0 0 0 0 0
  58    55      53248 lvm55 0 0 0 0 0 0 0 0 0 0 0
  58    56      53248 lvm56 0 0 0 0 0 0 0 0 0 0 0
  58    57      53248 lvm57 0 0 0 0 0 0 0 0 0 0 0
  58    58      53248 lvm58 0 0 0 0 0 0 0 0 0 0 0
  58    59      53248 lvm59 0 0 0 0 0 0 0 0 0 0 0
  58    60      53248 lvm60 0 0 0 0 0 0 0 0 0 0 0
  58    61      53248 lvm61 0 0 0 0 0 0 0 0 0 0 0
  58    62      53248 lvm62 0 0 0 0 0 0 0 0 0 0 0
  58    63      53248 lvm63 0 0 0 0 0 0 0 0 0 0 0
  58    64      53248 lvm64 0 0 0 0 0 0 0 0 0 0 0
  58    65      53248 lvm65 0 0 0 0 0 0 0 0 0 0 0
  58    66      53248 lvm66 0 0 0 0 0 0 0 0 0 0 0
  58    67      53248 lvm67 0 0 0 0 0 0 0 0 0 0 0
  58    68      53248 lvm68 0 0 0 0 0 0 0 0 0 0 0
  58    69      53248 lvm69 0 0 0 0 0 0 0 0 0 0 0
  58    70      53248 lvm70 0 0 0 0 0 0 0 0 0 0 0
  58    71      53248 lvm71 0 0 0 0 0 0 0 0 0 0 0
  58    72      53248 lvm72 0 0 0 0 0 0 0 0 0 0 0
  58    73      53248 lvm73 0 0 0 0 0 0 0 0 0 0 0
  58    74      53248 lvm74 0 0 0 0 0 0 0 0 0 0 0
  58    75      53248 lvm75 0 0 0 0 0 0 0 0 0 0 0
  58    76      53248 lvm76 0 0 0 0 0 0 0 0 0 0 0
  58    77      53248 lvm77 0 0 0 0 0 0 0 0 0 0 0
  58    78      53248 lvm78 0 0 0 0 0 0 0 0 0 0 0
  58    79      53248 lvm79 0 0 0 0 0 0 0 0 0 0 0
  58    80      53248 lvm80 0 0 0 0 0 0 0 0 0 0 0
   9     0    2048192 md0 0 0 0 0 0 0 0 0 0 0 0
   9     1   31744320 md1 0 0 0 0 0 0 0 0 0 0 0
   9     2    2048192 md2 0 0 0 0 0 0 0 0 0 0 0
   8     0   35843686 sda 968 3528 34954 6130 6382 16200 134552 38890 0 13090 45020
   8     1    2048256 sda1 918 3371 34312 4940 6073 8754 119024 38720 0 12770 43660
   8     2    2048287 sda2 3 0 24 20 1 0 8 0 0 20 20
   8     3   31744440 sda3 42 142 578 1160 308 7446 15520 170 0 290 1330
   8    16   35843686 sdb 1011 2866 29606 5580 6382 16200 134552 42130 0 11810 47710
   8    17    2048256 sdb1 958 2647 28822 4220 6073 8754 119024 41960 0 11470 46180
   8    18    2048287 sdb2 3 0 24 30 1 0 8 0 0 30 30
   8    19   31744440 sdb3 45 204 720 1310 308 7446 15520 170 0 340 1480