[TUHS] SunOS code?
imp at bsdimp.com
Sat Sep 1 08:02:26 AEST 2018
On Fri, Aug 31, 2018 at 3:59 PM Larry McVoy <lm at mcvoy.com> wrote:
> A bunch of people stuck around and tried, they really did and I applaud
> them for it but the damage was done. I was gone by the time ZFS came out
> so I have no idea how that passed through the formal vetting process that
> Sun had in place. When I was there, if I had proposed a file system that
> wouldn't use the page cache, you'd have to copy from the buffer cache
> into the page cache to get mmap to work, I would have been kicked out
> of the room and probably kicked out of the kernel group. We had spent
> SO FRIGGING MUCH TIME getting rid of the buffer cache, precisely because
> trying to maintain coherency between the page cache (mmap) and the buffer
> cache (read/write), it was clear that you wanted a unified model.
It's reason #1 why Netflix can't use ZFS: the double copy problem...
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