Eli Cohen wrote:
On Sun, 2007-09-30 at 11:13 +0200, Or Gerlitz wrote:
If I understand correctly, there were two kinds of flags discussed in
this thread. One of them is using __GFP_HIGHMEM for allocating buffers
to be utilized in the receive flow of ipoib cm which it was agreed that
will hurt performance.
The second one is using a capability flag which devices use to declare
that they support high dma - this one is not required too but implies
that ipath will not work on 32 bit platforms (e.g. i386 with PAE).
What I would like to see agreement on is if we don't require this flag
from the rdma device, how a user is being prevent from running into
troubles when using ipoib/ipath/32bit/high-mem. If such config is
impossible, that's fine.
Saying that, Or, can you clarify how would you like the change-long
comment to be changed?
something like:
This patch assumes all IB devices support DMA to high-mem pages
Or.
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