2 messages, 2 authors, 2016-07-27 · open the first message on its own page
From: LEROY Christophe <hidden>
Date: 2016-07-26 17:52:53
In ppc8xx tlbmiss handler, we consider a page valid if both _PAGE_PRESENT and _PAGE_ACCESSED are set. Is there any chance to have _PAGE_ACCESSED set and not _PAGE_PRESENT ? Otherwise we could simplify the handler by considering the page valid only when _PAGE_ACCESSED is set Christophe
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2016-07-27 10:32:12
On Tue, 2016-07-26 at 19:52 +0200, LEROY Christophe wrote:
In ppc8xx tlbmiss handler, we consider a page valid if both _PAGE_PRESENT and _PAGE_ACCESSED are set. Is there any chance to have _PAGE_ACCESSED set and not _PAGE_PRESENT ? Otherwise we could simplify the handler by considering the page valid only when _PAGE_ACCESSED is set
When _PAGE_PRESENT is not set, the PTE becomes a swap PTE and a pile of the other bits can be repurposed, you may want to verify if _PAGE_ACCESSED is one of them. Cheers, Ben.