• Theodore Ts'o's avatar
    ext4: Adjust ext4_da_writepages() to write out larger contiguous chunks · 55138e0b
    Theodore Ts'o authored
    
    
    Work around problems in the writeback code to force out writebacks in
    larger chunks than just 4mb, which is just too small.  This also works
    around limitations in the ext4 block allocator, which can't allocate
    more than 2048 blocks at a time.  So we need to defeat the round-robin
    characteristics of the writeback code and try to write out as many
    blocks in one inode before allowing the writeback code to move on to
    another inode.  We add a a new per-filesystem tunable,
    max_writeback_mb_bump, which caps this to a default of 128mb per
    inode.
    
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    55138e0b