[Bug 356] New: htree appears to leak memory

From: Martin J. Bligh (mbligh@aracnet.com)
Date: Fri Feb 14 2003 - 13:15:30 EST


           Summary: htree appears to leak memory
    Kernel Version: 2.5.60-bk4
            Status: NEW
          Severity: normal
             Owner: akpm@digeo.com
         Submitter: bwindle-kbt@fint.org

Distribution: Debian Testing
Hardware Environment: single x86 CPU, Intel Corp. 82371AB/EB/MB PIIX4 IDE
(rev 01), Maxtor 91728D8, ATA DISK drive, 256mb RAM
Software Environment:
Problem Description:
In playing with ext3+htree, something is leaking memory on deletes (I

razor:/giant# cat /proc/meminfo
MemTotal: 255884 kB
MemFree: 28416 kB
Buffers: 3812 kB
Cached: 6544 kB
SwapCached: 0 kB
Active: 21228 kB
Inactive: 6520 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 255884 kB
LowFree: 28416 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 16 kB
Writeback: 0 kB
Mapped: 19668 kB
Slab: 197068 kB
Committed_AS: 95668 kB
PageTables: 484 kB
ReverseMaps: 6098

SysRq : Show Memory
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 30, high 90, batch 15
cpu 0 cold: low 0, high 30, batch 15
HighMem per-cpu: empty

Free pages: 2040kB (0kB HighMem)
Active:13749 inactive:0 dirty:0 writeback:0 free:510
DMA free:1148kB min:128kB low:256kB high:384kB active:11336kB inactive:0kB
Normal free:892kB min:1020kB low:2040kB high:3060kB active:43660kB
inactive:0kB HighMem free:0kB min:0kB low:0kB high:0kB active:0kB
inactive:0kB DMA: 1*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 0*256kB 0*512kB
1*1024kB 0*2048kB 0*4096kB = 1148kB
Normal: 1*4kB 1*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 0*1024kB
0*2048 kB 0*4096kB = 892kB
HighMem: empty
Swap cache: add 0, delete 0, find 0/0, race 0+0
Free swap: 0kB
65536 pages of RAM
0 pages of HIGHMEM
1581 reserved pages
518 pages shared
0 pages swap cached

And the memory won't free if I try to use it...

bwindle@razor:~/C$ ./alloc 50
Allocating 50 megs...

      malloc(52428800): Cannot allocate memory

Steps to reproduce:
I unmountd an existing ext3 partition, ran tune2fs -O dir_index on it, did
an e2fsck -fD, then mounted it. Created a bunch of directories and files,
and did a 'rm -rf *' on them.

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This archive was generated by hypermail 2b29 : Sat Feb 15 2003 - 22:00:56 EST