Messages in this thread | | | Date | Tue, 4 Mar 2008 11:00:31 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [RFC] Notifier for Externally Mapped Memory (EMM) |
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On Tue, 4 Mar 2008, Andrea Arcangeli wrote:
> When working with single pages it's more efficient and preferable to > call invalidate_page and only later release the VM reference on the > page.
But as you pointed out before that path is a slow path anyways. Its rarely taken. Having a single eviction callback simplifies design.
Plus the device driver can still check if the mapping was of PAGE_SIZE and then implement its own optimization.
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