* Hugh Dickins <[email protected]> [2005-11-19 19:57:02 +0000]:
> On Fri, 18 Nov 2005, Hugh Dickins wrote:
> >
> > Thanks for the info you've sent so far, implicating
> > snd_pcm_mmap_data_nopage. But I've still not got it. Will resume
> > tomorrow. If you can, would you please each send me your .config
> > and your full startup dmesg (in case they help to focus me on which
> > paths to look down in sound). You needn't spam akpm or lkml with them.
>
> And thanks for the further info you sent, which allowed me to rebuild my
> kernel to reproduce the problem easily with artsd. Though the answer was
> staring me in the face from the first info you sent (and did occasionally
> flit through my mind without being properly swatted), even in my Subject
> line above: why were the page flags 0x414 instead of 0x4414 i.e. what had
> happened to the PageCompound flag which I thought one of my patches was
> adding?
>
> Whoops, I'd completely missed that now we have to pass __GFP_COMP to
> turn on that behaviour, because there are or were a few other places
> which get confused by compound page behaviour. There's an excellent,
> illuminating, prescient comment on compound pages by Andrew in
> ChangeLog-2.6.6: but though he there foresees sound DMA buffers needing
> it, I've a suspicion that DRM and some others might also be needing it.
>
> So I'll go on a trawl through the source before finalizing the fix,
> but below is the patch you guys need. Does this patch deal with your
> Bad page states too, Marc? Does it help your mouse at all somehow?
>
Sorry for the late reply. I was just busy but I'll make the best out of
the sunday morning. :)
After applying the patch the console was quite clean as it used to be.
Thus it seems to work for me as well.
Thanks Hugh,
Marc
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