Messages in this thread | | | Date | Wed, 03 Mar 2004 11:07:39 -0600 | From | Dave McCracken <> | Subject | Re: 230-objrmap fixes for 2.6.3-mjb2 |
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--On Wednesday, March 03, 2004 17:57:46 +0100 Andrea Arcangeli <andrea@suse.de> wrote:
>> There was talk at one point of moving the "unswappable" state down into >> the struct page. Is that still realistic? It would seem rather more >> efficient, but I forget what problem we ran into with it. > > that already exists and it's PG_reserved, but it's inefficient compared > to VM_RESERVED, since it forces the vm to check all ptes.
What we've actually discussed before was more along the lines of PG_locked to match VM_LOCKED, but the main idea was to be able to skip over ineligible pages without having ot look up their mappings during pageout.
Dave McCracken
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