Andrea Arcangeli wrote:
>
> On Fri, Oct 20, 2000 at 02:19:59PM -0400, Jeff Garzik wrote:
> > Why? [..]
>
> vma information isn't passed from v4l layer to lowlevel layer.
so I see :(
The Matrox Meteor II driver I'm developing uses DMA memory, PCI shared
memory, -or- reserve_bootmem memory in mm
On Fri, Oct 20, 2000 at 02:19:59PM -0400, Jeff Garzik wrote:
> Why? [..]
vma information isn't passed from v4l layer to lowlevel layer.
Andrea
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On Fri, 20 Oct 2000, Jeff Garzik wrote:
>
> If I understand your patch, I should call vma_reserve(), and then
> completely remove my no-op swapout(). Correct?
Note that I dislike "wrapper.h", and I just removed that part.
I don't think it's any clearer to write "vma_reserve(vma)" than it is
Andrea Arcangeli wrote:
> On Fri, Oct 20, 2000 at 01:46:53PM -0400, Jeff Garzik wrote:
> > In any case, we shouldn't modify videodev.c to call vma_reserve()...
> > Let the driver's mmap operation do that or not do that, as it chooses.
>
> It can't with the current mmap video4linux kernel API.
Wh
On Fri, Oct 20, 2000 at 01:46:53PM -0400, Jeff Garzik wrote:
> In any case, we shouldn't modify videodev.c to call vma_reserve()...
> Let the driver's mmap operation do that or not do that, as it chooses.
It can't with the current mmap video4linux kernel API.
In practice it doesn't matter becau
On Fri, Oct 20, 2000 at 10:44:40AM -0700, Linus Torvalds wrote:
> agree with your change, but I just suspect it will break drivers that have
you're right, it would break it, the driver should really somehow increase the
pagecount for each mapping with the PG_reserved removed (in the future that c
Andrea Arcangeli wrote:
> > As to your rvmalloc()/rvfree() changes, I don't think they are safe as-is:
> > I think it's the right thing to do, but I don't trust the drivers to
> > maintain the right page counts. The code used to mark the pages as
> > reserved, which probably means that it hides ba
On Fri, Oct 20, 2000 at 10:10:05AM -0700, Linus Torvalds wrote:
> Sure. I have no problem at all with this suggestion: it's basically just a
> hint to the VM layer that trying to page something out in this vma is
> useless, as its backing store is in memory anyway.
Yes, that is _exactly_ the poin
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