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    Subject[PATCH 5.17 192/298] tcp: use alloc_large_system_hash() to allocate table_perturb
    Date
    From: Muchun Song <songmuchun@bytedance.com>

    [ Upstream commit e67b72b90b7e19a4be4d9c29f3feea6f58ab43f8 ]

    In our server, there may be no high order (>= 6) memory since we reserve
    lots of HugeTLB pages when booting. Then the system panic. So use
    alloc_large_system_hash() to allocate table_perturb.

    Fixes: e9261476184b ("tcp: dynamically allocate the perturb table used by source ports")
    Signed-off-by: Muchun Song <songmuchun@bytedance.com>
    Reviewed-by: Eric Dumazet <edumazet@google.com>
    Link: https://lore.kernel.org/r/20220607070214.94443-1-songmuchun@bytedance.com
    Signed-off-by: Jakub Kicinski <kuba@kernel.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    net/ipv4/inet_hashtables.c | 10 ++++++----
    1 file changed, 6 insertions(+), 4 deletions(-)

    diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
    index a5d57fa679ca..55654e335d43 100644
    --- a/net/ipv4/inet_hashtables.c
    +++ b/net/ipv4/inet_hashtables.c
    @@ -917,10 +917,12 @@ void __init inet_hashinfo2_init(struct inet_hashinfo *h, const char *name,
    init_hashinfo_lhash2(h);

    /* this one is used for source ports of outgoing connections */
    - table_perturb = kmalloc_array(INET_TABLE_PERTURB_SIZE,
    - sizeof(*table_perturb), GFP_KERNEL);
    - if (!table_perturb)
    - panic("TCP: failed to alloc table_perturb");
    + table_perturb = alloc_large_system_hash("Table-perturb",
    + sizeof(*table_perturb),
    + INET_TABLE_PERTURB_SIZE,
    + 0, 0, NULL, NULL,
    + INET_TABLE_PERTURB_SIZE,
    + INET_TABLE_PERTURB_SIZE);
    }

    int inet_hashinfo2_init_mod(struct inet_hashinfo *h)
    --
    2.35.1


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