lkml.org 
[lkml]   [2006]   [Mar]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 10 of 20] ipath - support for userspace apps using core driver
From
Date
On Thu, 2006-03-09 at 16:01 -0800, Roland Dreier wrote:
> Bryan> Any idea what I should be using instead?
>
> It depends what you're trying to do. Hence my original question: why
> are you doing SetPageReserved?

We're mapping some memory that the chip DMAs to into userspace, so that
user processes can spin on memory locations without going through the
kernel. The SetPageReserved hack is an attempt to stop the VM from
reclaiming those pages from us once a user process exits.

I realise that it's surely bogus, and I'd be thrilled to do something
correct instead. We've tried doing both SetPageReserved and get_page,
but it hasn't work out too well so far.

<b

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-03-10 01:10    [from the cache]
©2003-2011 Jasper Spaans