ext4 bug ? "Intel 320 SSD write performance – contd."

[Vincent Pelletier]

Hi.

Reading this blog post[1], I thought the "2nd iteration" results could be
considered a bug in mkfs.ext4 (and possibly any mkfs implementation):
shouldn't mkfs run [FI]TRIM on its target before creating filesystem
structure ?

Disclaimers:
I don't know much about mkfs nor in-kernel fs support to tell which part
should implement this - so I cannot even tell for sure this isn't done
already.
I have no idea how expensive those new calls would be (in general, this
means trimming a _lot_ of pages...).
I don't know how other filesystems/os behave on such bench. But I
don't think this is a problem any SSD could solve at its level.

[1] http://www.mysqlperformanceblog.com/2011/09/28/intel-320-ssd-write-performance-contd/

Regards,
-- 
Vincent Pelletier
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