From 2723c9fc775c6366011f6915d3ea1aab085a92fe Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@felloff.net>
Date: Tue, 20 Jun 2017 21:53:45 +0200
Subject: kernel: add support for sticky segments (cached, preallocated, never
 paged)

---
 sys/src/9/port/fault.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'sys/src/9/port/fault.c')

diff --git a/sys/src/9/port/fault.c b/sys/src/9/port/fault.c
index a5e80336c..8180747e4 100644
--- a/sys/src/9/port/fault.c
+++ b/sys/src/9/port/fault.c
@@ -270,6 +270,8 @@ fixfault(Segment *s, uintptr addr, int read)
 			copypage(old, *pg);
 			putpage(old);
 		}
+		/* wet floor */
+	case SG_STICKY:			/* Never paged out */
 		mmuphys = PPN((*pg)->pa) | PTEWRITE | PTEVALID;
 		(*pg)->modref = PG_MOD|PG_REF;
 		break;
-- 
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