Re: USB transfer_buffer allocations on 64bit systems

From: Daniel Mack
Date: Wed Apr 07 2010 - 11:36:00 EST

On Wed, Apr 07, 2010 at 08:31:54AM -0700, Greg KH wrote:
> On Wed, Apr 07, 2010 at 05:11:25PM +0200, Daniel Mack wrote:
> > I vote for a clean solution, a fixup of existing implementations and
> > a clear note about how to allocate buffers for USB drivers. I believe
> > faulty allocations of this kind can explain quite a lot of problems on
> > x86_64 machines.
> Yeah, I really don't want to have to change every driver in different
> ways just depending on if someone thinks it is going to need to run on
> this wierd hardware.
> Alan, any objection to just using usb_buffer_alloc() for every driver?
> Or is that too much overhead?

FWIW, most drivers I've seen in the past hours use a wild mix of
kmalloc(), kzalloc(), kcalloc() and usb_buffer_alloc(). That should
really be unified.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at