On Tue, Nov 28, 2000 at 11:46:10AM -0700, Hans Reiser wrote:
> We need vm to push the FS which pushes raid, [..]
This just happens.
> [..] and the FS needs to know about
> or even contain the stripe cache.
That's not a blkdev layer issue but a FS<->LVM/RAID issue.
What's suboptimal at the moment with multiple disks because of the blkdev layer
unplug-all-devices interface (between FS and blkdev [raid or real harddisk]) is
when you are reading from disk or when you're doing O_SYNC operation. For async
writes (no O_SYNC) we're just pretty much fine.
Andrea
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