Messages in this thread | | | Subject | Re: [PATCH 10 of 20] ipath - support for userspace apps using core driver | From | Bryan O'Sullivan <> | Date | Thu, 09 Mar 2006 16:07:42 -0800 |
| |
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/
| |