• Chris Mason's avatar
    Btrfs: don't return congestion in write_cache_pages as often · 9b0d3ace
    Chris Mason authored
    On fast devices that go from congested to uncongested very quickly, pdflush
    is waiting too often in congestion_wait, and the FS is backing off to
    easily in write_cache_pages.
    
    For now, fix this on the btrfs side by only checking congestion after
    some bios have already gone down.  Longer term a real fix is needed
    for pdflush, but that is a larger project.
    Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    9b0d3ace
extent_io.c 92.4 KB