Messages in this thread | | | Date | Sat, 03 Mar 2007 17:25:30 -0500 | From | Rik van Riel <> | Subject | Re: userspace pagecache management tool |
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Andrew Morton wrote:
> Well, backup programs are a unique case. Let's say instead that the user > has just generated a 600MB ISO image. > > The kernel *just doesn't know* whether the user will next try to read the > kernel tree or will next try to read that ISO image. > > That, Rik, is my point, and is the entire point of this work.
I still don't understand why "the backup program flushed my data out of the cache with POSIX_FADV_DONTNEED" is an improvement over "the backup program flushed my data out of the cache by reading other files".
Your code may be useful for a few specialized situations, but I don't see it actually fixing most of the examples you gave in your announcement, except for the DVD copying one.
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