Messages in this thread | | | Date | Wed, 3 Mar 2004 22:05:54 +0100 | From | Andrea Arcangeli <> | Subject | Re: 230-objrmap fixes for 2.6.3-mjb2 |
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On Wed, Mar 03, 2004 at 01:01:21PM -0600, Dave McCracken wrote: > The point would be to have a way of finding and skipping the locked page > before we go look up the vmas for it. 2.4 doesn't have that problem > because it's working from the vma.
it has the same problem because we scan those pages always at the physical side and always at the pagetable side. we could avoid scanning them at the pagetable side, but we scan them anyways exactly to be able to call mark_page_accessed that will move the page in the active list, so the physical side doesn't waste an excessive amount of cpu on unfreeable mlocked pages.
the trick is to keep marking those mlocked pages as accessed (so they go into the active list) every time we encounter them and we find them mlocked, so they're not in our way all the time. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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