From: Arun Kumar Neelakantam <aneela@codeaurora.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: netdev@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Chris Lew <clew@codeaurora.org>
Subject: Re: netdev_alloc_skb is failing for 16k length
Date: Tue, 28 May 2019 15:38:18 +0530 [thread overview]
Message-ID: <2ab84730-70ae-4f30-241d-e51bc0c61d16@codeaurora.org> (raw)
In-Reply-To: <20190527075956.26f869ec@hermes.lan>
On 5/27/2019 8:29 PM, Stephen Hemminger wrote:
> On Mon, 27 May 2019 12:21:51 +0530
> Arun Kumar Neelakantam <aneela@codeaurora.org> wrote:
>
>> Hi team,
>>
>> we are using "skb = netdev_alloc_skb(NULL, len);" which is getting
>> failed sometimes for len = 16k.
>>
>> I suspect mostly system memory got fragmented and hence atomic memory
>> allocation for 16k is failing, can you please suggest best way to handle
>> this failure case.
>>
>> Thanks
>>
>> Arun N
>>
> If you are handling big frames, then put the data in page size chunks
> and use build_skb.
Thank you. Now using alloc_skb_with_frags() with order 0 to allocate the
memory fragments
and skb_store_bits() to store the data to skb from buffer.
prev parent reply other threads:[~2019-05-28 10:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-27 6:51 netdev_alloc_skb is failing for 16k length Arun Kumar Neelakantam
2019-05-27 14:59 ` Stephen Hemminger
2019-05-28 10:08 ` Arun Kumar Neelakantam [this message]
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