hmm.
looks Andrew Morton should return BKL in ext3_get_block_handle() in -mm tree?
this BKL protects ext3_alloc_branch() -> ext3_alloc_block() -> ext3_new_block()
call chain. or we may implement new protection schema where each jh has some
reference alike 'used by transaction N'
Andrew?
>>>>> Stephen C Tweedie (SCT) writes:
SCT> Not with BKL. Without it, yes, that's definitely a risk, and you need
SCT> some locking for the access to b_committed_data. Without that, even if
SCT> you keep the jh->b_committed_data field valid, you risk freeing the old
SCT> copy that another thread is using.
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