Messages in this thread | | | Date | Sat, 21 Apr 2001 19:48:25 +0200 (CEST) | From | Mike Galbraith <> | Subject | Re: try_to_swap_out() deactivating pages w. count > 2 |
| |
On Sat, 21 Apr 2001, Rik van Riel wrote:
> On Sat, 21 Apr 2001, Mike Galbraith wrote: > > > 30:04: [pid-4] page:c10599f4 deact:0 cache:0 age:29 count:164 [164? 1] > > 30:04: [pid-4] page:c10599a8 deact:0 cache:0 age:26 count:164 > > > 1. what kind of page has 164 references? > > mmap(/lib/libc.so, FLAGS);
I figured that out too in the meantime. (14hrs at a stretch makes more than eyeballs bleary..)
> > 2. why deactivate pages (lots) with count > 2? PINGpong. > > They're not deactivated, they're removed from this proces' virtual > memory mapping.
blush.. yup.
> What I _am_ worried about is the fact that we do this to pages with > a really high page age. These things are in active use and cannot > be swapped out any time soon, yet we do claim swap space for it ...
I'll see if it makes any noticable difference tomorrow. Enough fruitless effort for one day.
:) Am I likely to learn more about how swapcache works when I try to instantly donate these to page_launder() tomorrow morning?
[4] mm:c2ce9f00 page:c1001060 deact:0 cache:1 buf:0 age:5 cnt:1 [2285] mm:c67ef760 page:c1002b18 deact:0 cache:1 buf:0 age:5 cnt:1
-Mike
- 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/
| |