Messages in this thread |  | | | Date | Thu, 1 Feb 2001 17:27:02 +0000 | | From | "Stephen C. Tweedie" <> | | Subject | Re: [PATCH] vma limited swapin readahead |
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Hi,
On Thu, Feb 01, 2001 at 02:45:04PM -0200, Rik van Riel wrote: > On Thu, 1 Feb 2001, Stephen C. Tweedie wrote: > > But only when the extra pages we're reading in don't > displace useful data from memory, making us fault in > those other pages ... causing us to go to the disk > again and do more readahead, which could potentially > displace even more pages, etc...
Remember, it's a balance. You can displace a few useful pages and still win overall because the cost _per page_ goes way down due to better disk IO utilisation.
> One solution could be to put (most of) the swapin readahead > pages on the inactive_dirty list, so pressure by readahead > on the resident pages is smaller and the not used readahead > pages are reclaimed faster.
Yep, that would make much sense.
--Stephen - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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