From 81fb68fee81769d81c373e3af5a508d706b7e3d6 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 30 Oct 2016 20:58:55 +0100
Subject: wire console display pages
to work around improper handling of getting paged out.
* console/display.c (user_create): Call vm_wire() on the created user data.
---
console/display.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/console/display.c b/console/display.c
index 98c70f50..ed5571e6 100644
--- a/console/display.c
+++ b/console/display.c
@@ -814,6 +814,21 @@ user_create (display_t display, uint32_t width, uint32_t height,
user->cursor.status = CONS_CURSOR_NORMAL;
conchar_memset (user->_matrix, chr, attr,
user->screen.width * user->screen.lines);
+
+ /* FIXME: it seems we don't properly handle getting paged out.
+ * For now, just wire the pages to work around the issue. */
+ {
+ mach_port_t host;
+
+ error_t err = get_privileged_ports (&host, NULL);
+ if (err)
+ host = mach_host_self ();
+
+ vm_wire (host, mach_task_self (), (vm_offset_t) user,
+ (vm_size_t) npages * vm_page_size, VM_PROT_READ);
+ if (host != mach_host_self ())
+ mach_port_deallocate (mach_task_self (), host);
+ }
return 0;
}
--
cgit v1.2.3