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    ext4: Properly update i_disksize. · cf17fea6
    Aneesh Kumar K.V 提交于
    With delayed allocation we use i_data_sem to update i_disksize.  We need
    to update i_disksize only if the new size specified is greater than the
    current value and we need to make sure we don't race with other
    i_disksize update.  With delayed allocation we will switch to the
    write_begin function for non-delayed allocation if we are low on free
    blocks.  This means the write_begin function for non-delayed allocation
    also needs to use the same locking.
    
    We also need to check and update i_disksize even if the new size is less
    that inode.i_size because of delayed allocation.
    Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
    Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
    cf17fea6
extents.c 76.0 KB