> If I could choose what filesystem to run on / - it impact performance greatly
No, it doesn't. Most of lookups go outside of root and within root you
mostly deal with cached lookups from dcache (which doesn't give a damn for
fs type) and with page cache lookups for data (mostly in libc) (ditto).
[snip]
> This would be one little step toward the microkernel architecture (like Hurd).
> Good again :-)
Hurd and architecture in one sentence? Uh-oh...
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