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Re: Invalidate page cache

On Sun, Nov 30, 2014 at 05:56:40AM +0100, Emmanuel Dreyfus wrote:
> Chuck Silvers <> wrote:
> > you can use msync() with MS_INVALIDATE.
> That cannot not help with vnode cached pages, right?

(matt already gave you the answer you wanted but...)

yes, msync(MS_INVALIDATE) works for vnode (or any uvm_object) pages too,
the difference is just that a dirty vnode-backed page is
written to backing store before being invalidated.

but if you just want something for hand testing and are running as root,
then the failed-umount trick is more convenient.  I use that myself.


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