Messages in this thread Patch in this message |  | | From | Daniel Phillips <> | Subject | Re: Memory Problem in 2.4.9 ? | Date | Wed, 22 Aug 2001 02:43:37 +0200 |
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On August 22, 2001 02:04 am, Stephan von Krawczynski wrote: > Daniel Phillips <phillips@bonn-fries.net> wrote: > > > > Aug 21 20:14:51 admin kernel: __alloc_pages: 3-order allocation failed > > > (gfp=0x20/0). > > > Aug 21 20:14:51 admin last message repeated 146 times > > > > > > Next idea? > > > > It's an atomic allocation, the driver is supposed to be able to handle > > this, and it does since you report that the burn just runs slowly, it > > does not stop. There is way too much in cache: > > > > > total: used: free: shared: buffers: cached: > > > Mem: 1053675520 1047502848 6172672 0 20930560 939307008 > > > Swap: 271392768 15880192 255512576 > > > > This is causing the high order allocation failures - with only a small > > fraction of memory free the chances of none of it being in contiguous, > > aligned 8 page units rises dramatically. > > I basically thought the same. In fact I do not understand why. Are there any > parameters tunable to balance the whole picture a bit more towards the free > pages?
I'd like to try to isolate the cause a little more. Can you please try the following patch and see if it improves the cache balance. (This would not be a good solution, it will just help show what is happening.)
--- ../2.4.9.clean/mm/filemap.c Thu Aug 16 14:12:07 2001 +++ ./mm/filemap.c Wed Aug 22 01:11:44 2001 @@ -980,7 +980,7 @@ static inline void check_used_once (struct page *page) { if (!PageActive(page)) { - if (page->age) + if (page->age > 8) activate_page(page); else { page->age = PAGE_AGE_START; - 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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