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Subject: Re: contigmalloc won't allocate more than one page
From: Justin Hibbits <jrh29@alumni.cwru.edu>
To: Konstantin Belousov <kostikbel@gmail.com>
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On Sun, Jul 21, 2013 at 9:54 PM, Konstantin Belousov <kostikbel@gmail.com>wrote:

> On Sun, Jul 21, 2013 at 06:51:22PM -0700, Justin Hibbits wrote:
> > I've been spending the day trying to get ofwdump to work correctly on
> > ppc64, and found that for at least one property it needs a full page for
> > the property value.  So, to fix this I checked the maximum ioctl sizes,
> and
> > with a buffer it totals 5 pages, so I tried to get
> ofw_real_bounce_alloc()
> > to allocate 5 pages instead of one.  WIth this, it hangs when allocating
> > the memory for the buffer.  So, I tried just two pages, and got the same
> > result.
> Could you test on other architectures, esp. on x86i, please ?
>

Unfortunately for this test, all I have physical access to are PowerPC.
 It's possible that contigmalloc() can allocate more memory, but possibly
later in the boot cycle, as this code runs very early on.


> What version do you use, head ?
>

Yes, running head as of a few days ago.

- Justin