Re: user-space unaligned accesses

From: Grant Grundler <iod00d_at_hp.com>
Date: 2003-10-09 07:46:18
On Wed, Oct 08, 2003 at 08:42:00AM -0600, Bjorn Helgaas wrote:
> ...
> The ia64 architecture does a tty_write
> on a userspace unaligned access. Not only is this extremenly annoying,
> it's also very broken since the tty may well be suspended etc etc.
> Doing a printk on such an access by default is very broken already,
> lets not make it worse

This was beat to death on linux-ia64 already where davidm and davem
decided to disagree on the utility of printing unaligned accesses
to the tty.

davidm wrote:
| At the moment, there are two ways to control the unaligned message printing:
| 
|  - use the dmesg command to lower the printing threshold below KERN_WARNING
|     ("dmesg -n4", IIRC)
| 
|  - use prctl --unalign=silent to turn off unaligned printing for a
|    particular task and its children

Running prctl on relevant gettys at boot time would have the same effect.

grant
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Received on Wed Oct 8 17:46:18 2003

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