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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.11-rc3-V0.7.38-01
    Steven Rostedt <rostedt@goodmis.org> wrote:
    >
    > The problem here is that it's not ext3 bh's only. They're still the normal
    > buffer head. The problem arrises because the ext3 "journal head" is
    > allocated within these bit spin locks.

    Yes, the locks do want to live inside the buffer_head.

    Stephen has pointed out that we might want to remove
    jbd_lock_bh_journal_head() altogether some time, just use
    jbd_lock_bh_state() for that.

    In 2.4 these locks are global (or per-superblock). Making them a global
    spinlock would be acceptable for 2-ways and probably larger.

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