Messages in this thread | | | Date | Thu, 6 Dec 2001 17:48:42 -0500 (EST) | From | Alexander Viro <> | Subject | Re: SMP/cc Cluster description |
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On Thu, 6 Dec 2001, Larry McVoy wrote:
> I'm not sure what the point is. We've already agreed that the multiple OS > instances will have synchonization to do for file operations, ftruncate > being one of them.
That's nice. But said operation involves serious wanking with metadata and _that_ would better have exclusion with write(2) and some warranties about pageouts.
You can do lockless get_block() and truncate(). And it will be a hive of races always ready to break out. We used to try that and it was a fscking mess of unbelievable proportions - worse than that in full-blown rename() support.
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