• O
    [PATCH] Fix and add EXPORT_SYMBOL(filemap_write_and_wait) · 28fd1298
    OGAWA Hirofumi 提交于
    This patch add EXPORT_SYMBOL(filemap_write_and_wait) and use it.
    
    See mm/filemap.c:
    
    And changes the filemap_write_and_wait() and filemap_write_and_wait_range().
    
    Current filemap_write_and_wait() doesn't wait if filemap_fdatawrite()
    returns error.  However, even if filemap_fdatawrite() returned an
    error, it may have submitted the partially data pages to the device.
    (e.g. in the case of -ENOSPC)
    
    <quotation>
    Andrew Morton writes,
    
    If filemap_fdatawrite() returns an error, this might be due to some
    I/O problem: dead disk, unplugged cable, etc.  Given the generally
    crappy quality of the kernel's handling of such exceptions, there's a
    good chance that the filemap_fdatawait() will get stuck in D state
    forever.
    </quotation>
    
    So, this patch doesn't wait if filemap_fdatawrite() returns the -EIO.
    
    Trond, could you please review the nfs part?  Especially I'm not sure,
    nfs must use the "filemap_fdatawrite(inode->i_mapping) == 0", or not.
    Acked-by: NTrond Myklebust <trond.myklebust@fys.uio.no>
    Signed-off-by: NAndrew Morton <akpm@osdl.org>
    Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
    28fd1298
xfs_fs_subr.c 2.2 KB