linux-kernel - Re: [PATCH net] atl1c: Improve driver not to do order 4 GFP

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Message-Id: <20151204.112140.1465149588813636971.davem@davemloft.net>
Date:	Fri, 04 Dec 2015 11:21:40 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	pavel@....cz
Cc:	eric.dumazet@...il.com, mhocko@...nel.org, akpm@...l.org,
	linux-kernel@...r.kernel.org, jcliburn@...il.com,
	chris.snook@...il.com, netdev@...r.kernel.org, rjw@...ysocki.net,
	linux-mm@...ck.org, nic-devel@...lcomm.com, ronangeles@...il.com,
	ebiederm@...ssion.com
Subject: Re: [PATCH net] atl1c: Improve driver not to do order 4 GFP_ATOMIC
 allocation

From: Pavel Machek <pavel@....cz>
Date: Fri, 4 Dec 2015 09:11:27 +0100

>> >>  	if (unlikely(!ring_header->desc)) {
>> >> -		dev_err(&pdev->dev, "pci_alloc_consistend failed\n");
>> >> +		dev_err(&pdev->dev, "could not get memory for DMA buffer\n");
>> >>  		goto err_nomem;
>> >>  	}
>> >>  	memset(ring_header->desc, 0, ring_header->size);
>> >> 
>> >> 
>> > 
>> > So this memset() will really require a different patch to get removed ?
>> > 
>> > Sigh, not sure why I review patches.
>> 
>> Agreed, please use dma_zalloc_coherent() and kill that memset().
> 
> Ok, updated. I'll also add cc: stable, because it makes notebooks with
> affected chipset unusable.

Networking patches do not use CC: stable, instead you simply ask me
to queue it up and then I batch submit networking fixes to -stable
periodically myself.
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