On Sun, Aug 05, 2007 at 11:01:18AM -0700, Arjan van de Ven wrote:

on the journalling side this would be one transaction (not 5 milion)
and... since inodes are grouped on disk, you can even get some better
coalescing this way... 

Wonder if we could do inode-grouping smartly; eg if we HAVE to write
inode X, also write out the atime-dirty inodes in range X-Y to X+Y
(where Y is some tunable) in the same IO..

We already have filesystems in the tree that do such advances things as
inode writeback clustering for more than ten years :)

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