linux-kernel - Re: [PATCH] rtlwifi: ratelimit skb allocation failure message

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Date:	Tue, 10 Feb 2015 15:48:26 +0200
From:	Kalle Valo <kvalo@...eaurora.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Colin King <colin.king@...onical.com>,
	Larry Finger <Larry.Finger@...inger.net>,
	Chaoming Li <chaoming_li@...lsil.com.cn>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtlwifi: ratelimit skb allocation failure message

Eric Dumazet <eric.dumazet@...il.com> writes:

> On Tue, 2015-02-10 at 08:54 +0000, Colin King wrote:
>> From: Colin Ian King <colin.king@...onical.com>
>> 
>> when running low on memory I noticed rtlwifi was producing a large
>> quantity of repeated skb allocation failures messages.  This should
>> be ratelimited to reduce the noise.
>> 
>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>> ---
>>  drivers/net/wireless/rtlwifi/pci.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/drivers/net/wireless/rtlwifi/pci.c b/drivers/net/wireless/rtlwifi/pci.c
>> index c70efb9..ca0fd50 100644
>> --- a/drivers/net/wireless/rtlwifi/pci.c
>> +++ b/drivers/net/wireless/rtlwifi/pci.c
>> @@ -817,7 +817,7 @@ static void _rtl_pci_rx_interrupt(struct ieee80211_hw *hw)
>>  		/* get a new skb - if fail, old one will be reused */
>>  		new_skb = dev_alloc_skb(rtlpci->rxbuffersize);
>>  		if (unlikely(!new_skb)) {
>> -			pr_err("Allocation of new skb failed in %s\n",
>> +			pr_err_ratelimited("Allocation of new skb failed in %s\n",
>>  			       __func__);
>
> Or even better, remove the message.

There's actually a pending patch for that, I'll send it to Dave ASAP:

https://patchwork.kernel.org/patch/5671121/

-- 
Kalle Valo
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