netdev - Re: [PATCH net] bna: page allocation during interrupts to use a mempool.

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Message-ID: <alpine.DEB.2.00.1410081207420.16668@ware.dreamhost.com>
Date:	Wed, 8 Oct 2014 12:07:59 -0700 (PDT)
From:	Eric Wheeler <netdev@...ts.ewheeler.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
cc:	Shahed Shaikh <shahed.shaikh@...gic.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	netdev <netdev@...r.kernel.org>,
	Rasesh Mody <rasesh.mody@...gic.com>
Subject: Re: [PATCH net] bna: page allocation during interrupts to use a
 mempool.

On Tue, 7 Oct 2014, Eric Dumazet wrote:

> On Tue, 2014-10-07 at 17:48 -0700, Eric Wheeler wrote:
>
>> Just += unmap->vector.len still did not work (same backtrace), so I've
>> rebuilt with PAGE_SIZE<<2 and so far so good.  I'll let it run all night
>> and see if we get any problems.
>
> Further inspection of the driver told me that unmap->vector.len should
> be 16384 already. (same than PAGE_SIZE << 2)
> (set at line 304, drivers/net/ethernet/brocade/bna/bnad.c)
>
> So you might hit memory fragmentation issues.
>
> Do you have CONFIG_COMPACTION=y in your .config ?

yes.

-e

>
>
>
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