>>>>> Andrew Morton (AM) writes:
AM> Alex Tomas <bzzz@tmi.comex.ru> wrote:
>>
>> 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'
AM> Can this be solved by spinlocking the relevant buffer_head, in a similar
AM> way to your recent changes to journal_add_journal_head()?
yes, we may protect it by such lock, but this lock have to be held all time
ext3_new_block() uses some b_committed_data because last one may be freed
during current ext3_new_block(). I don't think it's good.
probably, another solution is do not free b_committed_data if it's referenced
by new transaction and make copy from b_frozen instead of freeing it.
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