On 04/20/2012 07:01 AM, James Bottomley wrote:
The concern I have is that the notion of hot and cold files *isn't* propagated to the page cache, it's just shared between the fs and the disk.
Bingo -- full-file hint is too coarse-grained for some workloads. Page granularity would propagate to the VM as well as block layer, and give the required flexibility to all workloads. As well as covering the full-file case.
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