Messages in this thread |  | | Date | Fri, 5 Oct 2001 20:26:06 +0100 (BST) | From | Hugh Dickins <> | Subject | pre4 oom too soon |
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2.4.11-pre4 gives me oom_kill I never got before. All numbers decimal in 4kB pages:
num_physpages 65520 free or freeable 56000 (from MemFree after swapoff afterwards) total_swap_pages 132526 prog tries to hog 153600
At oom_kill time:
all_zones_low yes (DMA & Normal well above min, no Highmem) nr_swap_pages 0 page_cache_size 59013 swapper_space.nrpages 58202
I'm not sure exactly what to blame in out_of_memory(), but it does look wrong to depend so much on whether nr_swap_pages happens to be 0 at that instant or not, and a lot of that full swap is duplicated in the swap cache. Probably that should be taken into consideration?
(I wonder whether, before my 2.4.10 fix to lowest_bit and highest_bit in scan_swap_map, it was rarer to find nr_swap_pages 0 - swap pages could be free, but invisible to scan_swap_map.)
Hugh
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