lkml.org 
[lkml]   [1999]   [Feb]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [showstopper] Memory leak in 2.2.1
    Date
    Hello!

    > > There is nasty memory leak in 2.2.1. Looks like it is in VFS.
    > > I have 4G partition, with a lot of files on it (squid cache)
    > > Whenever I try to copy it to another one, copying never finishes
    > > buffers and cached gets lower and lower (64M RAM), and finally
    > > I get messages like "no memory for bash" etc. Kernel is alive,
    > > but system is dead.
    > > 100% reproducable. 2.0.36 is fine
    > > Hope that helps.
    >
    > Not really. What filesystem you are using? How does 2.1.130 behave
    ext2fs. 2.1.130 behaves absolutely the same way.

    > (release prior to the latest VFS changes)? What about alt-sysrq? What
    alt-sysrq works almost as expected (a-s-r however doesnot result in clean
    fs on boot, however)
    > kind of buffers breeds? If you can cat /proc/slabinfo in process it would
    > give some idea on WTF happens. Please, give more details.
    So I booted 2.2.1 in single user and tried to record some stats (2.1.130 is
    the same, so I'm not going to show it stats here):

    free output and slabinfo before starting copy:
    total used free shared buffers cached
    Mem: 63528 4052 59476 1148 2084 968
    -/+ buffers/cache: 1000 62528
    Swap: 104384 0 104384

    slabinfo - version: 1.0
    kmem_cache 28 42
    tcp_tw_bucket 0 0
    tcp_bind_bucket 0 0
    tcp_open_request 0 0
    skbuff_head_cache 0 0
    sock 3 11
    dquot 0 0
    filp 16 42
    signal_queue 0 0
    buffer_head 2116 2142
    mm_struct 3 31
    vm_area_struct 34 63
    dentry_cache 57 62
    files_cache 2 14
    uid_cache 0 0
    size-131072 0 0
    size-65536 0 0
    size-32768 0 0
    size-16384 0 0
    size-8192 0 0
    size-4096 2 2
    size-2048 4 4
    size-1024 2 8
    size-512 16 16
    size-256 11 14
    size-128 262 275
    size-64 56 84
    size-32 84 126
    slab_cache 5 63

    free output right after memory fills with cache

    total used free shared buffers cached
    Mem: 63528 62860 668 656 20392 38852
    -/+ buffers/cache: 3616 59912
    Swap: 104384 216 104168

    free output, slabinfo and "ps axl" in the middle of copy:

    total used free shared buffers cached
    Mem: 63528 62368 1160 804 6684 14620
    -/+ buffers/cache: 41064 22464
    Swap: 104384 212 104172

    slabinfo - version: 1.0
    kmem_cache 28 42
    tcp_tw_bucket 0 0
    tcp_bind_bucket 0 0
    tcp_open_request 0 0
    skbuff_head_cache 0 0
    sock 3 11
    dquot 0 0
    filp 32 42
    signal_queue 0 0
    buffer_head 6244 6552
    mm_struct 4 31
    vm_area_struct 45 63
    dentry_cache 47 93
    files_cache 3 14
    uid_cache 0 0
    size-131072 0 0
    size-65536 0 0
    size-32768 0 0
    size-16384 0 0
    size-8192 0 0
    size-4096 2 2
    size-2048 5 8
    size-1024 2 8
    size-512 16 16
    size-256 11 14
    size-128 262 275
    size-64 56 84
    size-32 88 126
    slab_cache 6 63


    FLAGS UID PID PPID PRI NI SIZE RSS WCHAN STA TTY TIME COMMAND
    100 0 1 0 0 0 1148 0 c0115fb1 SW ? 0:03 (bash)
    40 0 2 1 0 0 0 0 c0125be5 SW ? 0:00 (kflushd)
    840 0 3 1 0 0 0 0 c011fad6 SW ? 0:00 (kswapd)
    100 0 7 1 13 0 1144 448 c0115fb1 S ? 0:00 bash
    100 0 13 1 11 0 7092 5276 c011b185 D ? 0:33 cp -a /us
    0 0 131 7 14 0 888 364 0 R ? 0:00 ps axl

    free output, slabinfo and "ps axl" in the when I decided to stop copy:

    total used free shared buffers cached
    Mem: 63528 55940 7588 888 1336 3876
    -/+ buffers/cache: 50728 12800
    Swap: 104384 200 104184

    slabinfo - version: 1.0
    kmem_cache 28 42
    tcp_tw_bucket 0 0
    tcp_bind_bucket 0 0
    tcp_open_request 0 0
    skbuff_head_cache 0 0
    sock 3 11
    dquot 0 0
    filp 32 42
    signal_queue 0 0
    buffer_head 1372 2016
    mm_struct 3 31
    vm_area_struct 34 63
    dentry_cache 41 62
    files_cache 2 14
    uid_cache 0 0
    size-131072 0 0
    size-65536 0 0
    size-32768 0 0
    size-16384 0 0
    size-8192 0 0
    size-4096 3 4
    size-2048 4 8
    size-1024 2 8
    size-512 17 24
    size-256 11 14
    size-128 262 275
    size-64 57 84
    size-32 87 126
    slab_cache 8 63


    FLAGS UID PID PPID PRI NI SIZE RSS WCHAN STA TTY TIME COMMAND
    100 0 1 0 0 0 1148 348 c0186552 S ? 0:03 init
    40 0 2 1 0 0 0 0 c0125be5 SW ? 0:01 (kflushd)
    840 0 3 1 1 0 0 0 c011fad6 SW ? 0:01 (kswapd)
    100 0 7 1 19 0 1148 428 c0115fb1 S ? 0:00 bash
    0 0 171 7 19 0 888 364 0 R ? 0:00 ps axl

    free output and slabinfo after umount of target and remount ro source fs:

    total used free shared buffers cached
    Mem: 63528 61912 1616 972 7820 2764
    -/+ buffers/cache: 51328 12200
    Swap: 104384 156 104228

    slabinfo - version: 1.0
    kmem_cache 28 42
    tcp_tw_bucket 0 0
    tcp_bind_bucket 0 0
    tcp_open_request 0 0
    skbuff_head_cache 0 0
    sock 3 11
    dquot 0 0
    filp 32 42
    signal_queue 0 0
    buffer_head 7848 8316
    mm_struct 3 31
    vm_area_struct 34 63
    dentry_cache 50 62
    files_cache 2 14
    uid_cache 0 0
    size-131072 0 0
    size-65536 0 0
    size-32768 0 0
    size-16384 0 0
    size-8192 0 0
    size-4096 3 4
    size-2048 4 4
    size-1024 2 8
    size-512 17 24
    size-256 11 14
    size-128 261 275
    size-64 56 84
    size-32 84 126
    slab_cache 7 63

    What else can I do?
    BTW, Andrea Arcangeli told me to use his ikd patch, but given URL was wrong, so
    I cannot provide such info for now. Will it be useful?

    Bye,
    Oleg
    --
    [RAVE *SUCKS* TEAM] [Team $Ui(iDE] [Trans-M Must Die!] [Sepultura Fans Team]
    [Tolkien forever team]

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:50    [W:0.031 / U:121.652 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site