Re: New USB stack on FreeBSD w/Linux emulation layer coming

Alan Stern <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Thu, 17 May 2007, Laurent Pinchart wrote:

> A user of the Linux UVC driver unfortunately reported such a failure. The 
> driver allocates 5 bulk URBs, and the device asked for a 2.7MB buffer. The 
> system had been used for quite some time, and the user reported that 
> allocating such an amount of contiguous memory made the box swap out and 
> become very slow.

Obviously the driver should be smart enough not to try and get such a
large buffer.  It should allocate several smaller buffers instead.

Alan Stern


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