Re: 2.5.70-mm1

[Martin J. Bligh]

> OK, a 10x improvement isn't too bad.  I'm hoping the gap between ext2 and
> ext3 is mainly idle time and not spinning-on-locks time.
> 
> 
>> 
>>    2024927   267.3% total
>>    1677960   472.8% default_idle
>>     116350     0.0% .text.lock.transaction
>>      42783     0.0% do_get_write_access
>>      40293     0.0% journal_dirty_metadata
>>      34251  6414.0% __down
>>      27867  9166.8% .text.lock.attr
> 
> Bah.  In inode_setattr(), move the mark_inode_dirty() outside
> lock_kernel().

OK, will do. 

>>      20016  2619.9% __wake_up
>>      19632   927.4% schedule
>>      12204     0.0% .text.lock.sched
>>      12128     0.0% start_this_handle
>>      10011     0.0% journal_add_journal_head
> 
> hm, lots of context switches still.

I think that's ext3 busily kicking the living crap out of semaphores ;-)
See __down above ...

M.