Re: [PATCH 0/5] VFS: Directory level cache cleaning

[Cong Wang]

On Mon, Dec 16, 2013 at 7:00 AM, Li Wang <liwang@xxxxxxxxxxxxxxx> wrote:
> This patch extend the 'drop_caches' interface to
> support directory level cache cleaning and has a complete
> backward compatibility. '{1,2,3}' keeps the same semantics
> as before. Besides, "{1,2,3}:DIRECTORY_PATH_NAME" is allowed
> to recursively clean the caches under DIRECTORY_PATH_NAME.
> For example, 'echo 1:/home/foo/jpg > /proc/sys/vm/drop_caches'
> will clean the page caches of the files inside 'home/foo/jpg'.
>

This interface is ugly...

And we already have a file-level drop cache, that is,
fadvise(DONTNEED). Can you extend it if it can't
handle a directory fd?
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