Messages in this thread |  | | Date | Thu, 26 Apr 2001 16:21:55 +0200 (CEST) | From | Mike Galbraith <> | Subject | Re: [patch] swap-speedup-2.4.3-B3 (fwd) |
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On Thu, 26 Apr 2001, Rik van Riel wrote:
> On Thu, 26 Apr 2001, Mike Galbraith wrote: > > > 1. pagecache is becoming swapcache and must be aged before anything is > > done. Meanwhile we're calling refill_inactive_scan() so fast that noone > > has a chance to touch a page. Age becomes a simple counter.. I think. > > When you hit a big surge, swap pages are at the back of all lists, so all > > of your valuable cache gets reclaimed before we write even one swap page. > > Does the patch I sent to linux-mm@kvack.org last night help in > this ? > > I found that the way refill_inactive_scan() and swap_out() are being > called from the main loop in refill_inactive() aren't equal and have > fixed that in a way which (IMHO) also beautifies the code a bit. > > (and makes sure background aging doesn't get out of hand with a few > simple checks)
That patch livelocked my box with only ~1000 pages on any list.
I can go back and test some more if you want. (I've seen this so many times here that I generally just curse a lot [frustration] and burn the whole tree to it's roots as soon as it shows up)
SysRq: Show Memory Mem-info: Free pages: 1404kB ( 0kB HighMem) ( Active: 975, inactive_dirty: 28, inactive_clean: 0, free: 351 (351 702 1053) ) 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 1*512kB 0*1024kB 0*2048kB = 512kB) 1*4kB 5*8kB 1*16kB 0*32kB 1*64kB 0*128kB 1*256kB 1*512kB 0*1024kB 0*2048kB = 892kB) = 0kB) Swap cache: add 72, delete 63, find 17/67 Free swap: 264864kB 32752 pages of RAM 0 pages of HIGHMEM 1183 reserved pages 27657 pages shared 9 pages swap cached 0 pages in page table cache Buffer memory: 112kB
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