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    SubjectRe: kmemleak for MIPS
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    Le mercredi 30 mars 2011 à 13:17 +0100, Maxin John a écrit :
    > A quick observation from dmesg after placing printks in
    > "net/ipv4/udp.c" for MIPS-malta
    >
    > CONFIG_BASE_SMALL : 0
    > table->mask : 127
    > UDP_HTABLE_SIZE_MIN : 256
    >
    > dmesg:
    > ....
    > ...
    > TCP: Hash tables configured (established 8192 bind 8192)
    > TCP reno registered
    > CONFIG_BASE_SMALL : 0
    > UDP hash table entries: 128 (order: 0, 4096 bytes)
    > table->mask, UDP_HTABLE_SIZE_MIN : 127 256
    > CONFIG_BASE_SMALL : 0
    > UDP-Lite hash table entries: 128 (order: 0, 4096 bytes)
    > table->mask, UDP_HTABLE_SIZE_MIN : 127 256
    > NET: Registered protocol family 1
    > ....
    > ....
    >
    > printk(s) are placed in udp.c as listed below:
    >
    > diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
    > index 588f47a..ca7f6c6 100644
    > --- a/net/ipv4/udp.c
    > +++ b/net/ipv4/udp.c
    > @@ -2162,7 +2162,7 @@ __setup("uhash_entries=", set_uhash_entries);
    > void __init udp_table_init(struct udp_table *table, const char *name)
    > {
    > unsigned int i;
    > -
    > + printk("CONFIG_BASE_SMALL : %d \n", CONFIG_BASE_SMALL);
    > if (!CONFIG_BASE_SMALL)
    > table->hash = alloc_large_system_hash(name,
    > 2 * sizeof(struct udp_hslot),
    > @@ -2175,6 +2175,8 @@ void __init udp_table_init(struct udp_table
    > *table, const char *name)
    > /*
    > * Make sure hash table has the minimum size
    > */
    > + printk("table->mask, UDP_HTABLE_SIZE_MIN : %d %d
    > \n",table->mask,UDP_HTABLE_SIZE_MIN);
    > +
    > if (CONFIG_BASE_SMALL || table->mask < UDP_HTABLE_SIZE_MIN - 1) {
    > table->hash = kmalloc(UDP_HTABLE_SIZE_MIN *
    > 2 * sizeof(struct udp_hslot), GFP_KERNEL);
    > ~


    How much memory do you have exactly on this machine ?

    alloc_large_system_hash() has no parameter to specify a minimum hash
    table, and UDP needs one.

    If you care about losing 8192 bytes of memory, you could boot with

    "uhash_entries=256"



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