linux-kernel - Re: Unloading sym53c8xx driver causes ___free_dma_mem

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Message-ID: <20101116192718.GC6178@parisc-linux.org>
Date:	Tue, 16 Nov 2010 12:27:19 -0700
From:	Matthew Wilcox <matthew@....cx>
To:	Wolfgang Denk <wd@...x.de>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Unloading sym53c8xx driver causes ___free_dma_mem_cluster
	warnings

On Tue, Nov 16, 2010 at 08:13:09PM +0100, Wolfgang Denk wrote:
> Hi,
> 
> when unloading the sym53c8xx driver a number of kernel warning
> messages are printed:

Yes, this is well known (if you search the scsi archives, you'll find
several previous reports).  It's harmless -- the only place it could hurt
is on ARM, and I've never heard of anyone plugging a sym2 card into an
ARM machine.

The fix would be quite involved, and the driver really isn't worth fixing
-- the hardware tops out at 160 MB/s which is an order of magnitude
lower performance than the hardware I'm currently working on.

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."
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