From: Benjamin LaHaise <bcrl@redhat.com>
To: "Amit S. Jain" <amitjain@tifr.res.in>
Cc: Joseph A Knapka <jknapka@earthlink.net>, linux-mm@kvack.org
Subject: Re: Memory allocation in Linux (fwd)
Date: Thu, 11 Apr 2002 18:08:47 -0400 [thread overview]
Message-ID: <20020411180847.E20895@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.21.0204111756220.26014-100000@mailhost.tifr.res.in>; from amitjain@tifr.res.in on Thu, Apr 11, 2002 at 06:16:56PM +0530
On Thu, Apr 11, 2002 at 06:16:56PM +0530, Amit S. Jain wrote:
> Hi everyone,
> This is a continuation of the mail I had written earlier (see
> down)tellin bout my problem that when i use vmalloc()...I get an error stating
> "PCI bus error 2290".I think i have a slight idea what the problem could
> be.....Hope u all could comment on it.
> The large amount of memory i obtain using vmalloc is then pointed to by
> the skb "network" buffers as i copy data into this memory which has to be
> transmitted.Since the memory is discontinuous implying data is
> discontinuous and the ethernet card I am using is REALTEK8139 which
> doesnot support SCATTER/GATHER DMA.... hence the PCI bus cant find the
> continuous data which has to be transmitted.
You cannot pass address returned from vmalloc to hardware: vmalloc returns
a virtual mapping of memory.
-ben
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next prev parent reply other threads:[~2002-04-11 22:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-04 7:34 Memory allocation in Linux (fwd) Amit S. Jain
2002-04-04 11:52 ` Joseph A Knapka
2002-04-11 12:46 ` Amit S. Jain
2002-04-11 22:08 ` Benjamin LaHaise [this message]
2002-04-15 8:45 ` Amit S. Jain
2002-04-19 17:46 ` Eric W. Biederman
2002-04-04 18:38 ` Ravi
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