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    SubjectRe: locking rules for ->dirty_inode()
    Nikita Danilov wrote:
    > Hello,
    > Documentation/filesystems/Locking states that all super operations may
    > block, but __set_page_dirty_buffers() calls
    > __mark_inode_dirty()->s_op->dirty_inode()
    > under mapping->private_lock spin lock.

    Actually it doesn't. We do not call down into the filesystem
    for I_DIRTY_PAGES.

    set_page_dirty() is already called under locks, via __free_pte (pagetable
    teardown). 2.4 does this as well.

    But I'll make the change anyway. I think it removes any
    ranking requirements between mapping->page_lock and
    mapping->private_lock, which is always a nice thing.
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      Last update: 2005-03-22 13:29    [W:0.019 / U:5.024 seconds]
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