| From: |
| Peter Zijlstra <peterz@infradead.org> |
| To: |
| linux-mm@kvack.org, linux-kernel@vger.kernel.org |
| Subject: |
| [RFC][PATCH 0/5] VM_PINNED |
| Date: |
| Mon, 26 May 2014 16:56:05 +0200 |
| Message-ID: |
| <20140526145605.016140154@infradead.org> |
| Cc: |
| Christoph Lameter <cl@linux.com>, Thomas Gleixner <tglx@linutronix.de>, Andrew Morton <akpm@linux-foundation.org>, Hugh Dickins <hughd@google.com>, Mel Gorman <mgorman@suse.de>, Roland Dreier <roland@kernel.org>, Sean Hefty <sean.hefty@intel.com>, Hal Rosenstock <hal.rosenstock@gmail.com>, Mike Marciniszyn <infinipath@intel.com>, Peter Zijlstra <peterz@infradead.org> |
| Archive‑link: | |
Article |
Hi all,
I mentioned at LSF/MM that I wanted to revive this, and at the time there were
no disagreements.
I finally got around to refreshing the patch(es) so here goes.
These patches introduce VM_PINNED infrastructure, vma tracking of persistent
'pinned' page ranges. Pinned is anything that has a fixed phys address (as
required for say IO DMA engines) and thus cannot use the weaker VM_LOCKED. One
popular way to pin pages is through get_user_pages() but that not nessecarily
the only way.
Roland, as said, I need some IB assistance, see patches 4 and 5, where I got
lost in the qib and ipath code.
Patches 1-3 compile tested.
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