Messages in this thread | | | Date | Tue, 27 May 2014 09:34:22 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [RFC][PATCH 0/5] VM_PINNED |
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On Tue, 27 May 2014, Peter Zijlstra wrote:
> The things I care about for VM_PINNED are long term pins, like the IB > stuff, which sets up its RDMA buffers at the start of a program and > basically leaves them in place for the entire duration of said program.
Ok that also means the pages are not to be allocated from ZONE_MOVABLE?
I expected the use of a page flag. With a vma flag we may have a situation that mapping a page into a vma changes it to pinned and terminating a process may unpin a page. That means the zone that the page should be allocated from changes.
Pinned pages in ZONE_MOVABLE are not a good idea. But since "kernelcore" is rarely used maybe that is not an issue?
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