linux-kernel - Re: [PATCH v2] tcp: use alloc_large_system_hash() to allocate table

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Date:   Wed, 8 Jun 2022 21:03:31 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     David Miller <davem@...emloft.net>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        David Ahern <dsahern@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>, Willy Tarreau <w@....eu>
Subject: Re: [PATCH v2] tcp: use alloc_large_system_hash() to allocate table_perturb

On Tue, Jun 7, 2022 at 12:02 AM Muchun Song <songmuchun@...edance.com> wrote:
>
> 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@...edance.com>
> ---
> v2:
>  - Add Fixes tag and replace kvmalloc_array with alloc_large_system_hash suggested
>    by Eric Dumazet.
>

Reviewed-by: Eric Dumazet <edumazet@...gle.com>

Thanks.