lkml.org 
[lkml]   [2006]   [Sep]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    SubjectRe: BUG: warning at fs/ext3/inode.c:1016/ext3_getblk()
    From
    Date
    On Tue, 2006-09-05 at 17:47 -0400, Will Simoneau wrote:
    > On 14:06 Tue 05 Sep , Badari Pulavarty wrote:
    > > Will Simoneau wrote:
    > > >Has anyone seen this before? These three traces occured at different times
    > > >today when three new user accounts (and associated quotas) were created.
    > > >This
    > > >machine is an NFS server which uses quotas on an ext3 fs (dir_index is on).
    > > >Kernel is 2.6.17.11 on an x86 smp w/64G highmem; 4G ram is installed. The
    > > >affected filesystem is on a software raid1 of two hardware raid0 volumes
    > > >from a
    > > >megaraid card.
    > > >
    > > >BUG: warning at fs/ext3/inode.c:1016/ext3_getblk()
    > > > <c01c5140> ext3_getblk+0x98/0x2a6 <c03b2806> md_wakeup_thread+0x26/0x2a
    > > > <c01c536d> ext3_bread+0x1f/0x88 <c01cedf9> ext3_quota_read+0x136/0x1ae
    > > > <c018b683> v1_read_dqblk+0x61/0xac <c0188f32> dquot_acquire+0xf6/0x107
    > > > <c01ceaba> ext3_acquire_dquot+0x46/0x68 <c01897d4> dqget+0x155/0x1e7
    > > > <c018a97b> dquot_transfer+0x3e0/0x3e9 <c016fe52> dput+0x23/0x13e

    I think, we found your problem.

    ext3_getblk() is not handling HOLE correctly. Does this patch help ?
    Mingming, what do you think ?

    Thanks,
    Badari

    ext3_get_blocks_handle() returns number of blocks it mapped.
    It returns 0 in case of HOLE. ext3_getblk() should handle
    HOLE properly (currently its dumping warning stack and
    returning -EIO).

    Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
    ---
    fs/ext3/inode.c | 9 +++++----
    1 file changed, 5 insertions(+), 4 deletions(-)

    Index: linux-2.6.18-rc5/fs/ext3/inode.c
    ===================================================================
    --- linux-2.6.18-rc5.orig/fs/ext3/inode.c 2006-08-27 20:41:48.000000000 -0700
    +++ linux-2.6.18-rc5/fs/ext3/inode.c 2006-09-05 15:32:57.000000000 -0700
    @@ -1009,11 +1009,12 @@ struct buffer_head *ext3_getblk(handle_t
    buffer_trace_init(&dummy.b_history);
    err = ext3_get_blocks_handle(handle, inode, block, 1,
    &dummy, create, 1);
    - if (err == 1) {
    + /*
    + * ext3_get_blocks_handle() returns number of blocks
    + * mapped. 0 in case of a HOLE.
    + */
    + if (err > 0) {
    err = 0;
    - } else if (err >= 0) {
    - WARN_ON(1);
    - err = -EIO;
    }
    *errp = err;
    if (!err && buffer_mapped(&dummy)) {

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

    \
     
     \ /
      Last update: 2006-09-06 00:43    [W:0.051 / U:0.048 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site