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

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Message-ID: <20151204081127.GA29367@amd>
Date:	Fri, 4 Dec 2015 09:11:27 +0100
From:	Pavel Machek <pavel@....cz>
To:	David Miller <davem@...emloft.net>
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

> >>  	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.

									Pavel

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