On Thu, May 05, 2011 at 02:42:17PM -0600, Michael L. Hitch wrote: > > Well, depending on how the raidframe code actually works, it could > certainly slow things down quite a bit. Assuming you are trying to > write 64k blocks to the block device and a 2K buffer cache size, > that means the one write of 64k blocks will be split into 32 > buffers, with the data copied from the user address space to the > buffers. Then each of those buffers would be written to the raid > device. The raidframe driver might them be reading the full data > strip into buffers, updating the 2K portion corresponding to the > request, and then writing the full data strip back to the disk.
Ah, yes, the old rmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmwrmw cycle. Gets me every time. Thor
