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    SubjectRe: [PATCH v2] mm: add a low limit to alloc_large_system_hash
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    From: Eric Dumazet <eric.dumazet@gmail.com>
    Date: Mon, 27 Feb 2012 07:03:17 +0100

    > UDP stack needs a minimum hash size value for proper operation and also
    > uses alloc_large_system_hash() for proper NUMA distribution of its hash
    > tables and automatic sizing depending on available system memory.
    >
    > On some low memory situations, udp_table_init() must ignore the
    > alloc_large_system_hash() result and reallocs a bigger memory area.
    >
    > As we cannot easily free old hash table, we leak it and kmemleak can
    > issue a warning.
    >
    > This patch adds a low limit parameter to alloc_large_system_hash() to
    > solve this problem.
    >
    > We then specify UDP_HTABLE_SIZE_MIN for UDP/UDPLite hash table
    > allocation.
    >
    > Reported-by: Mark Asselstine <mark.asselstine@windriver.com>
    > Reported-by: Tim Bird <tim.bird@am.sony.com>
    > Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>

    Acked-by: David S. Miller <davem@davemloft.net>

    Who wants to take this?



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