• Mingming Cao's avatar
    ext4: Split uninitialized extents for direct I/O · 0031462b
    Mingming Cao authored
    When writing into an unitialized extent via direct I/O, and the direct
    I/O doesn't exactly cover the unitialized extent, split the extent
    into uninitialized and initialized extents before submitting the I/O.
    This avoids needing to deal with an ENOSPC error in the end_io
    callback that gets used for direct I/O.
    
    When the IO is complete, the written extent will be marked as initialized.
    
    Singed-Off-By: Mingming Cao <cmm@us.ibm.com> 
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    0031462b
migrate.c 15.2 KB