On 12/1/06, Nick Piggin <[email protected]> wrote:
The pattern you are seeing here is probably due to the page allocator always retrying process context allocations which are <= order 3 (64K with 4K pages). You might be able to increase this limit a bit for your system, but it could easily cause problems. Especially fragmentation on nommu systems where the anonymous memory cannot be paged out.
Thanks for your clue. I found increasing this limit could really help my test cases. When MemFree < 8M, and the test case request 1M * 8 times, the allocation can be sucessful after 81 times rebalance, :). So far I haven't found any issue. If I make a patch to move this parameter to be tunable in the proc filesystem on nommu case, is it acceptable? Thanks, -Aubrey - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] 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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