On Mon, Sep 17, 2001 at 02:33:12PM +0200, Daniel Phillips wrote:
> The inactive queues have always had both mapped and unmapped pages on
> them. The reason for unmapping a swap cache page page when putting it
So the following code in refill_inactive_scan only exists in my
imagination?
if (page_count(page) <= (page->buffers ? 2 : 1)) {
deactivate_page_nolock(page);
page_active = 0;
} else {
page_active = 1;
}
We only move pages to the inactive list when they have one reference
from the page cache and one from buffers. Since all mapped pte's also
keep a reference, this means that there cannot be any pte's that point
to this page by the time we decide to deactivate the page.
> any choice. The point where we place it on the inactive queue is the
> last point where we're able to find its userspace page table entry.
And that is because we only move it after all pte's have been unmapped.
Jan
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This archive was generated by hypermail 2b29 : Sun Sep 23 2001 - 21:00:20 EST