drop old patch series

4 files changed, 0 insertions, 736 deletions

diff --git a/debian/patches/series b/debian/patches/series
index 40ca28c..50dcd13 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -12,6 +12,3 @@ sysenter0001-yyy-sysenter-prototype.patch
 
 fix-locking0004-vm-fix-locking-issues.patch
 fix-locking0005-ipc-fix-locking-issues.patch
-vm-cache-policy0001-VM-cache-policy-change.patch
-vm-cache-policy0002-vm-keep-track-of-clean-pages.patch
-vm-cache-policy0003-vm-evict-clean-pages-first.patch
diff --git a/debian/patches/vm-cache-policy0001-VM-cache-policy-change.patch b/debian/patches/vm-cache-policy0001-VM-cache-policy-change.patch
deleted file mode 100644
index e1b8648..0000000
--- a/debian/patches/vm-cache-policy0001-VM-cache-policy-change.patch
+++ /dev/null
@@ -1,346 +0,0 @@
-From ba7244b4c8d6200ea58135390f5a7d6fd0f24643 Mon Sep 17 00:00:00 2001
-From: Richard Braun <rbraun@sceen.net>
-Date: Wed, 9 Oct 2013 11:51:54 +0200
-Subject: [PATCH gnumach 1/3] VM cache policy change
-
-This patch lets the kernel unconditionnally cache non empty unreferenced
-objects instead of using a fixed arbitrary limit. As the pageout daemon
-evicts pages, it collects cached objects that have become empty. The
-effective result is a graceful adjustment of the number of objects
-related to memory management (virtual memory objects, their associated
-ports, and potentially objects maintained in the external memory
-managers). Physical memory can now be almost entirely filled up with
-cached pages. In addition, these cached pages are not automatically
-deactivated as objects can quickly be referenced again.
-
-There are problems with this patch however. The first is that, on
-machines with a large amount of physical memory (above 1 GiB but it also
-depends on usage patterns), scalability issues are exposed. For example,
-file systems which don't throttle their writeback requests can create
-thread storms, strongly reducing system responsiveness. Other issues
-such as linear scans of memory objects also add visible CPU overhead.
-
-The second is that, as most memory is used, it increases the chances of
-swapping deadlocks. Applications that map large objects and quickly
-cause lots of page faults can still easily bring the system to its
-knees.
----
- vm/vm_object.c   | 166 ++++++++++++++++++-------------------------------------
- vm/vm_object.h   |   7 ++-
- vm/vm_pageout.c  |   7 ++-
- vm/vm_resident.c |   4 +-
- 4 files changed, 68 insertions(+), 116 deletions(-)
-
-diff --git a/vm/vm_object.c b/vm/vm_object.c
-index 1d3e727..f97a3fd 100644
---- a/vm/vm_object.c
-+++ b/vm/vm_object.c
-@@ -59,6 +59,11 @@
- #include <ddb/db_output.h>
- #endif	/* MACH_KDB */
- 
-+void memory_object_release(
-+	ipc_port_t	pager,
-+	pager_request_t	pager_request,
-+	ipc_port_t	pager_name); /* forward */
-+
- /*
-  *	Virtual memory objects maintain the actual data
-  *	associated with allocated virtual memory.  A given
-@@ -159,8 +164,9 @@ vm_object_t		kernel_object = &kernel_object_store;
-  *
-  *	The kernel may choose to terminate objects from this
-  *	queue in order to reclaim storage.  The current policy
-- *	is to permit a fixed maximum number of unreferenced
-- *	objects (vm_object_cached_max).
-+ *	is to let memory pressure dynamically adjust the number
-+ *	of unreferenced objects. The pageout daemon attempts to
-+ *	collect objects after removing pages from them.
-  *
-  *	A simple lock (accessed by routines
-  *	vm_object_cache_{lock,lock_try,unlock}) governs the
-@@ -176,7 +182,6 @@ vm_object_t		kernel_object = &kernel_object_store;
-  */
- queue_head_t	vm_object_cached_list;
- int		vm_object_cached_count;
--int		vm_object_cached_max = 4000;	/* may be patched*/
- 
- decl_simple_lock_data(,vm_object_cached_lock_data)
- 
-@@ -344,6 +349,33 @@ void vm_object_init(void)
- 			IKOT_PAGING_NAME);
- }
- 
-+void vm_object_collect(
-+	register vm_object_t	object)
-+{
-+	vm_object_unlock(object);
-+
-+	/*
-+	 *	The cache lock must be acquired in the proper order.
-+	 */
-+
-+	vm_object_cache_lock();
-+	vm_object_lock(object);
-+
-+	/*
-+	 *	If the object was referenced while the lock was
-+	 *	dropped, cancel the termination.
-+	 */
-+
-+	if (!vm_object_collectable(object)) {
-+		vm_object_unlock(object);
-+		vm_object_cache_unlock();
-+		return;
-+	}
-+
-+	queue_remove(&vm_object_cached_list, object, vm_object_t, cached_list);
-+	vm_object_terminate(object);
-+}
-+
- /*
-  *	vm_object_reference:
-  *
-@@ -404,103 +436,35 @@ void vm_object_deallocate(
- 
- 		/*
- 		 *	See whether this object can persist.  If so, enter
--		 *	it in the cache, then deactivate all of its
--		 *	pages.
-+		 *	it in the cache.
- 		 */
--		if (object->can_persist) {
--			boolean_t	overflow;
--
--			/*
--			 *	Enter the object onto the queue
--			 *	of "cached" objects.  Remember whether
--			 *	we've caused the queue to overflow,
--			 *	as a hint.
--			 */
--
-+		if (object->can_persist && (object->resident_page_count > 0)) {
- 			queue_enter(&vm_object_cached_list, object,
- 				vm_object_t, cached_list);
--			overflow = (++vm_object_cached_count > vm_object_cached_max);
-+			vm_object_cached_count++;
- 			vm_object_cached_pages_update(object->resident_page_count);
- 			vm_object_cache_unlock();
- 
--			vm_object_deactivate_pages(object);
- 			vm_object_unlock(object);
-+			return;
-+		}
- 
--			/*
--			 *	If we didn't overflow, or if the queue has
--			 *	been reduced back to below the specified
--			 *	minimum, then quit.
--			 */
--			if (!overflow)
--				return;
--
--			while (TRUE) {
--				vm_object_cache_lock();
--				if (vm_object_cached_count <=
--				    vm_object_cached_max) {
--					vm_object_cache_unlock();
--					return;
--				}
--
--				/*
--				 *	If we must trim down the queue, take
--				 *	the first object, and proceed to
--				 *	terminate it instead of the original
--				 *	object.	 Have to wait for pager init.
--				 *  if it's in progress.
--				 */
--				object= (vm_object_t)
--				    queue_first(&vm_object_cached_list);
--				vm_object_lock(object);
--
--				if (!(object->pager_created &&
--				    !object->pager_initialized)) {
--
--					/*
--					 *  Ok to terminate, hang on to lock.
--					 */
--					break;
--				}
--
--				vm_object_assert_wait(object,
--					VM_OBJECT_EVENT_INITIALIZED, FALSE);
--				vm_object_unlock(object);
--				vm_object_cache_unlock();
--				thread_block((void (*)()) 0);
--
--				/*
--				 *  Continue loop to check if cache still
--				 *  needs to be trimmed.
--				 */
--			}
-+		if (object->pager_created &&
-+		    !object->pager_initialized) {
- 
- 			/*
--			 *	Actually remove object from cache.
-+			 *	Have to wait for initialization.
-+			 *	Put reference back and retry
-+			 *	when it's initialized.
- 			 */
- 
--			queue_remove(&vm_object_cached_list, object,
--					vm_object_t, cached_list);
--			vm_object_cached_count--;
--
--			assert(object->ref_count == 0);
--		}
--		else {
--			if (object->pager_created &&
--			    !object->pager_initialized) {
--
--				/*
--				 *	Have to wait for initialization.
--				 *	Put reference back and retry
--				 *	when it's initialized.
--				 */
--				object->ref_count++;
--				vm_object_assert_wait(object,
--					VM_OBJECT_EVENT_INITIALIZED, FALSE);
--				vm_object_unlock(object);
--				vm_object_cache_unlock();
--				thread_block((void (*)()) 0);
--				continue;
--			  }
-+			object->ref_count++;
-+			vm_object_assert_wait(object,
-+				VM_OBJECT_EVENT_INITIALIZED, FALSE);
-+			vm_object_unlock(object);
-+			vm_object_cache_unlock();
-+			thread_block((void (*)()) 0);
-+			continue;
- 		}
- 
- 		/*
-@@ -875,28 +839,6 @@ kern_return_t memory_object_destroy(
- }
- 
- /*
-- *	vm_object_deactivate_pages
-- *
-- *	Deactivate all pages in the specified object.  (Keep its pages
-- *	in memory even though it is no longer referenced.)
-- *
-- *	The object must be locked.
-- */
--void vm_object_deactivate_pages(
--	vm_object_t	object)
--{
--	vm_page_t	p;
--
--	queue_iterate(&object->memq, p, vm_page_t, listq) {
--		vm_page_lock_queues();
--		if (!p->busy)
--			vm_page_deactivate(p);
--		vm_page_unlock_queues();
--	}
--}
--
--
--/*
-  *	Routine:	vm_object_pmap_protect
-  *
-  *	Purpose:
-@@ -2754,7 +2696,7 @@ void vm_object_page_remove(
- 	 *	It balances vm_object_lookup vs iteration.
- 	 */
- 
--	if (atop(end - start) < (unsigned)object->resident_page_count/16) {
-+	if (atop(end - start) < object->resident_page_count/16) {
- 		vm_object_page_remove_lookup++;
- 
- 		for (; start < end; start += PAGE_SIZE) {
-@@ -2978,7 +2920,7 @@ void vm_object_print(
- 
- 	iprintf("Object 0x%X: size=0x%X",
- 		(vm_offset_t) object, (vm_offset_t) object->size);
--	 printf(", %d references, %d resident pages,", object->ref_count,
-+	 printf(", %d references, %lu resident pages,", object->ref_count,
- 		object->resident_page_count);
- 	 printf(" %d absent pages,", object->absent_count);
- 	 printf(" %d paging ops\n", object->paging_in_progress);
-diff --git a/vm/vm_object.h b/vm/vm_object.h
-index 3bfc67a..fa208aa 100644
---- a/vm/vm_object.h
-+++ b/vm/vm_object.h
-@@ -72,7 +72,7 @@ struct vm_object {
- 						 */
- 
- 	int			ref_count;	/* Number of references */
--	int			resident_page_count;
-+	unsigned long		resident_page_count;
- 						/* number of resident pages */
- 
- 	struct vm_object	*copy;		/* Object that should receive
-@@ -169,6 +169,7 @@ vm_object_t	kernel_object;		/* the single kernel object */
- 
- extern void		vm_object_bootstrap(void);
- extern void		vm_object_init(void);
-+extern void		vm_object_collect(vm_object_t);
- extern void		vm_object_terminate(vm_object_t);
- extern vm_object_t	vm_object_allocate(vm_size_t);
- extern void		vm_object_reference(vm_object_t);
-@@ -290,6 +291,10 @@ vm_object_t vm_object_copy_delayed(
-  *	Routines implemented as macros
-  */
- 
-+#define vm_object_collectable(object)					\
-+	(((object)->ref_count == 0)					\
-+	&& ((object)->resident_page_count == 0))
-+
- #define	vm_object_paging_begin(object) 					\
- 	((object)->paging_in_progress++)
- 
-diff --git a/vm/vm_pageout.c b/vm/vm_pageout.c
-index b676c7b..d0d124d 100644
---- a/vm/vm_pageout.c
-+++ b/vm/vm_pageout.c
-@@ -745,7 +745,12 @@ void vm_pageout_scan(void)
- 		    reclaim_page:
- 			vm_page_free(m);
- 			vm_page_unlock_queues();
--			vm_object_unlock(object);
-+
-+			if (vm_object_collectable(object))
-+				vm_object_collect(object);
-+			else
-+				vm_object_unlock(object);
-+
- 			continue;
- 		}
- 
-diff --git a/vm/vm_resident.c b/vm/vm_resident.c
-index c70fa73..b65b756 100644
---- a/vm/vm_resident.c
-+++ b/vm/vm_resident.c
-@@ -523,7 +523,7 @@ void vm_page_insert(
- 	 */
- 
- 	object->resident_page_count++;
--	assert(object->resident_page_count >= 0);
-+	assert(object->resident_page_count != 0);
- 
- 	if (object->can_persist && (object->ref_count == 0))
- 		vm_object_cached_pages_update(1);
-@@ -630,7 +630,7 @@ void vm_page_replace(
- 	 */
- 
- 	object->resident_page_count++;
--	assert(object->resident_page_count >= 0);
-+	assert(object->resident_page_count != 0);
- 
- 	if (object->can_persist && (object->ref_count == 0))
- 		vm_object_cached_pages_update(1);
--- 
-2.1.4
-
diff --git a/debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch b/debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch
deleted file mode 100644
index 45401ad..0000000
--- a/debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch
+++ /dev/null
@@ -1,330 +0,0 @@
-From 29b3ca0a0800894b563b16463dc62bf00433506d Mon Sep 17 00:00:00 2001
-From: Justus Winter <4winter@informatik.uni-hamburg.de>
-Date: Sat, 21 Feb 2015 00:05:31 +0100
-Subject: [PATCH gnumach 2/3] vm: keep track of clean pages
-
-* vm/vm_page.h (struct vm_page): New field `cleanq'.
-(vm_page_queue_clean): New declaration.
-(vm_page_clean_count): Likewise.
-(vm_page_queue_clean_lock): Likewise.
-(vm_page_mark_dirty): New function to set and clear the dirty flag.
-* vm/vm_resident.c (vm_page_queue_clean): New variable.
-(vm_page_queue_clean_lock): Likewise.
-(vm_page_clean_count): Likewise.
-(vm_page_bootstrap): Initialize field `cleanq', the queue and the lock.
-(vm_page_free): Get freed pages off the clean queue.
-* linux/dev/glue/block.c: Use `vm_page_mark_dirty'.
-* vm/memory_object.c: Likewise.
-* vm/vm_debug.c: Likewise.
-* vm/vm_fault.c: Likewise.
-* vm/vm_map.c: Likewise.
-* vm/vm_object.c: Likewise.
-* vm/vm_pageout.c: Likewise.
-* xen/block.c: Likewise.
----
- linux/dev/glue/block.c |  2 +-
- vm/memory_object.c     |  4 ++--
- vm/vm_debug.c          |  2 +-
- vm/vm_fault.c          |  6 +++---
- vm/vm_map.c            |  2 +-
- vm/vm_object.c         |  4 ++--
- vm/vm_page.h           | 33 +++++++++++++++++++++++++++++++--
- vm/vm_pageout.c        |  9 +++++----
- vm/vm_resident.c       | 10 ++++++++++
- xen/block.c            |  2 +-
- 10 files changed, 57 insertions(+), 17 deletions(-)
-
-diff --git a/linux/dev/glue/block.c b/linux/dev/glue/block.c
-index da4ef38..3bd2c5b 100644
---- a/linux/dev/glue/block.c
-+++ b/linux/dev/glue/block.c
-@@ -1537,7 +1537,7 @@ device_read (void *d, ipc_port_t reply_port,
- 	  if (dirty)
- 	    {
- 	      PAGE_WAKEUP_DONE (m);
--	      m->dirty = TRUE;
-+	      vm_page_mark_dirty (m, TRUE);
- 	      vm_page_insert (m, object, o);
- 	    }
- 	  else
-diff --git a/vm/memory_object.c b/vm/memory_object.c
-index 0a07429..55d8084 100644
---- a/vm/memory_object.c
-+++ b/vm/memory_object.c
-@@ -210,7 +210,7 @@ retry_lookup:
- 		 */
- 
- 		data_m->busy = FALSE;
--		data_m->dirty = FALSE;
-+		vm_page_mark_dirty (data_m, FALSE);
- 		pmap_clear_modify(data_m->phys_addr);
- 
- 		data_m->page_lock = lock_value;
-@@ -557,7 +557,7 @@ memory_object_lock_result_t memory_object_lock_page(
- 		 */
- 
- 		if (!m->dirty)
--			m->dirty = pmap_is_modified(m->phys_addr);
-+			vm_page_mark_dirty (m, pmap_is_modified(m->phys_addr));
- 
- 		if (m->dirty || (m->precious &&
- 				 should_return == MEMORY_OBJECT_RETURN_ALL)) {
-diff --git a/vm/vm_debug.c b/vm/vm_debug.c
-index 227090e..822ca86 100644
---- a/vm/vm_debug.c
-+++ b/vm/vm_debug.c
-@@ -352,7 +352,7 @@ mach_vm_object_pages(
- 		if (((state & (VPI_STATE_NODATA|VPI_STATE_DIRTY)) == 0) &&
- 		    pmap_is_modified(p->phys_addr)) {
- 			state |= VPI_STATE_DIRTY;
--			p->dirty = TRUE;
-+			vm_page_mark_dirty (p, TRUE);
- 		}
- 
- 		vm_page_lock_queues();
-diff --git a/vm/vm_fault.c b/vm/vm_fault.c
-index 101ebce..935b7b7 100644
---- a/vm/vm_fault.c
-+++ b/vm/vm_fault.c
-@@ -997,7 +997,7 @@ vm_fault_return_t vm_fault_page(
- 
- 			vm_page_lock_queues();
- 			pmap_page_protect(m->phys_addr, VM_PROT_NONE);
--			copy_m->dirty = TRUE;
-+			vm_page_mark_dirty (copy_m, TRUE);
- 			vm_page_unlock_queues();
- 
- 			/*
-@@ -1096,7 +1096,7 @@ vm_fault_return_t vm_fault_page(
- 	 */
- 
- 	if (vm_fault_dirty_handling && (*protection & VM_PROT_WRITE))
--		m->dirty = TRUE;
-+		vm_page_mark_dirty (m, TRUE);
- 
- 	return(VM_FAULT_SUCCESS);
- 
-@@ -1976,7 +1976,7 @@ kern_return_t	vm_fault_copy(
- 			vm_page_zero_fill(dst_page);
- 		else
- 			vm_page_copy(src_page, dst_page);
--		dst_page->dirty = TRUE;
-+		vm_page_mark_dirty (dst_page, TRUE);
- 
- 		/*
- 		 *	Unlock everything, and return
-diff --git a/vm/vm_map.c b/vm/vm_map.c
-index 9098dfd..5e3fc2d 100644
---- a/vm/vm_map.c
-+++ b/vm/vm_map.c
-@@ -2960,7 +2960,7 @@ insert_pages:
- 		assert(!m->wanted);
- 
- 		m->busy = FALSE;
--		m->dirty = TRUE;
-+		vm_page_mark_dirty (m, TRUE);
- 		vm_page_replace(m, object, old_last_offset + offset);
- 		if (must_wire) {
- 			vm_page_wire(m);
-diff --git a/vm/vm_object.c b/vm/vm_object.c
-index f97a3fd..4d882c1 100644
---- a/vm/vm_object.c
-+++ b/vm/vm_object.c
-@@ -588,7 +588,7 @@ void vm_object_terminate(
- 		}
- 
- 		if (!p->dirty)
--			p->dirty = pmap_is_modified(p->phys_addr);
-+			vm_page_mark_dirty (p, pmap_is_modified(p->phys_addr));
- 
- 		if (p->dirty || p->precious) {
- 			p->busy = TRUE;
-@@ -1096,7 +1096,7 @@ kern_return_t vm_object_copy_slowly(
- 					 */
- 
- 					new_page->busy = FALSE;
--					new_page->dirty = TRUE;
-+					vm_page_mark_dirty (new_page, TRUE);
- 					vm_object_lock(result_page->object);
- 					PAGE_WAKEUP_DONE(result_page);
- 
-diff --git a/vm/vm_page.h b/vm/vm_page.h
-index e6a8c49..41c5711 100644
---- a/vm/vm_page.h
-+++ b/vm/vm_page.h
-@@ -70,8 +70,10 @@
-  *	and sundry status bits.
-  *
-  *	Fields in this structure are locked either by the lock on the
-- *	object that the page belongs to (O) or by the lock on the page
-- *	queues (P).  [Some fields require that both locks be held to
-+ *	object that the page belongs to (O), by the lock on the page
-+ *	queues (P), or by vm_page_queue_clean_lock (C).
-+ *
-+ *	[Some fields require that both locks, O and P, be held to
-  *	change that field; holding either lock is sufficient to read.]
-  */
- 
-@@ -79,6 +81,7 @@ struct vm_page {
- 	queue_chain_t	pageq;		/* queue info for FIFO
- 					 * queue or free list (P) */
- 	queue_chain_t	listq;		/* all pages in same object (O) */
-+	queue_chain_t	cleanq;		/* all clean pages (C) */
- 	struct vm_page	*next;		/* VP bucket link (O) */
- 
- 	vm_object_t	object;		/* which object am I in (O,P) */
-@@ -147,8 +150,12 @@ extern
- queue_head_t	vm_page_queue_active;	/* active memory queue */
- extern
- queue_head_t	vm_page_queue_inactive;	/* inactive memory queue */
-+extern
-+queue_head_t	vm_page_queue_clean;	/* clean memory queue */
- 
- extern
-+int	vm_page_clean_count;	/* How many pages are clean? */
-+extern
- int	vm_page_free_count;	/* How many pages are free? */
- extern
- int	vm_page_fictitious_count;/* How many fictitious pages are free? */
-@@ -184,6 +191,8 @@ decl_simple_lock_data(extern,vm_page_queue_lock)/* lock on active and inactive
- 						   page queues */
- decl_simple_lock_data(extern,vm_page_queue_free_lock)
- 						/* lock on free page queue */
-+decl_simple_lock_data(extern,vm_page_queue_clean_lock)
-+						/* lock on clean page queue */
- 
- extern unsigned int	vm_page_free_wanted;
- 				/* how many threads are waiting for memory */
-@@ -312,4 +321,24 @@ extern unsigned int	vm_page_info(
- 	}							\
- 	MACRO_END
- 
-+static inline void
-+vm_page_mark_dirty (vm_page_t m, boolean_t dirty)
-+{
-+	if (m->dirty == dirty && (dirty || m->cleanq.next))
-+		return;	/* No action necessary.  */
-+
-+	simple_lock (&vm_page_queue_clean_lock);
-+	if (dirty && m->cleanq.next) {
-+		queue_remove (&vm_page_queue_clean, m, vm_page_t, cleanq);
-+		vm_page_clean_count -= 1;
-+		m->cleanq.next = NULL;
-+	}
-+	if (! dirty) {
-+		queue_enter (&vm_page_queue_clean, m, vm_page_t, cleanq);
-+		vm_page_clean_count += 1;
-+	}
-+	simple_unlock (&vm_page_queue_clean_lock);
-+	m->dirty = dirty;
-+}
-+
- #endif	/* _VM_VM_PAGE_H_ */
-diff --git a/vm/vm_pageout.c b/vm/vm_pageout.c
-index d0d124d..a8db604 100644
---- a/vm/vm_pageout.c
-+++ b/vm/vm_pageout.c
-@@ -292,7 +292,7 @@ vm_pageout_setup(
- 		vm_page_insert(m, new_object, new_offset);
- 		vm_page_unlock_queues();
- 
--		m->dirty = TRUE;
-+		vm_page_mark_dirty (m, TRUE);
- 		m->precious = FALSE;
- 		m->page_lock = VM_PROT_NONE;
- 		m->unlock_request = VM_PROT_NONE;
-@@ -304,7 +304,8 @@ vm_pageout_setup(
- 		 */
- 		vm_page_copy(m, new_m);
- 
--		m->dirty = FALSE;
-+		vm_object_lock(old_object);
-+		vm_page_mark_dirty (m, FALSE);
- 		pmap_clear_modify(m->phys_addr);
- 
- 		/*
-@@ -332,7 +333,7 @@ vm_pageout_setup(
- 		 *	Use the new page below.
- 		 */
- 		m = new_m;
--		m->dirty = TRUE;
-+		vm_page_mark_dirty (m, TRUE);
- 		assert(!m->precious);
- 		PAGE_WAKEUP_DONE(m);
- 	}
-@@ -777,7 +778,7 @@ void vm_pageout_scan(void)
- 		m->busy = TRUE;
- 		pmap_page_protect(m->phys_addr, VM_PROT_NONE);
- 		if (!m->dirty)
--			m->dirty = pmap_is_modified(m->phys_addr);
-+			vm_page_mark_dirty (m, pmap_is_modified(m->phys_addr));
- 
- 		if (m->external) {
- 			/* Figure out if we still care about this
-diff --git a/vm/vm_resident.c b/vm/vm_resident.c
-index b65b756..46980fc 100644
---- a/vm/vm_resident.c
-+++ b/vm/vm_resident.c
-@@ -148,9 +148,12 @@ vm_offset_t vm_page_fictitious_addr = (vm_offset_t) -1;
- queue_head_t	vm_page_queue_active;
- queue_head_t	vm_page_queue_inactive;
- decl_simple_lock_data(,vm_page_queue_lock)
-+queue_head_t	vm_page_queue_clean;
-+decl_simple_lock_data(,vm_page_queue_clean_lock)
- int	vm_page_active_count;
- int	vm_page_inactive_count;
- int	vm_page_wire_count;
-+int	vm_page_clean_count;
- 
- /*
-  *	Several page replacement parameters are also
-@@ -200,6 +203,7 @@ void vm_page_bootstrap(
- 	 */
- 
- 	m = &vm_page_template;
-+	m->cleanq.next = NULL;
- 	m->object = VM_OBJECT_NULL;	/* reset later */
- 	m->offset = 0;			/* reset later */
- 	m->wire_count = 0;
-@@ -231,12 +235,14 @@ void vm_page_bootstrap(
- 	 */
- 
- 	simple_lock_init(&vm_page_queue_free_lock);
-+	simple_lock_init(&vm_page_queue_clean_lock);
- 	simple_lock_init(&vm_page_queue_lock);
- 
- 	vm_page_queue_free = VM_PAGE_NULL;
- 	vm_page_queue_fictitious = VM_PAGE_NULL;
- 	queue_init(&vm_page_queue_active);
- 	queue_init(&vm_page_queue_inactive);
-+	queue_init(&vm_page_queue_clean);
- 
- 	vm_page_free_wanted = 0;
- 
-@@ -1304,6 +1310,10 @@ void vm_page_free(
- 	if (mem->absent)
- 		vm_object_absent_release(mem->object);
- 
-+
-+	/* Get it off the clean list.  */
-+	vm_page_mark_dirty (mem, TRUE);
-+
- 	/*
- 	 *	XXX The calls to vm_page_init here are
- 	 *	really overkill.
-diff --git a/xen/block.c b/xen/block.c
-index d98b31e..175955a 100644
---- a/xen/block.c
-+++ b/xen/block.c
-@@ -539,7 +539,7 @@ device_read (void *d, ipc_port_t reply_port,
- 	  assert (m->busy);
- 	  vm_page_lock_queues ();
- 	  PAGE_WAKEUP_DONE (m);
--	  m->dirty = TRUE;
-+	  vm_page_mark_dirty (m, TRUE);
- 	  vm_page_insert (m, object, o);
- 	  vm_page_unlock_queues ();
- 	  o += PAGE_SIZE;
--- 
-2.1.4
-
diff --git a/debian/patches/vm-cache-policy0003-vm-evict-clean-pages-first.patch b/debian/patches/vm-cache-policy0003-vm-evict-clean-pages-first.patch
deleted file mode 100644
index c7b03b4..0000000
--- a/debian/patches/vm-cache-policy0003-vm-evict-clean-pages-first.patch
+++ /dev/null
@@ -1,57 +0,0 @@
-From 91a700088a53173203486a751ad417502ccaf710 Mon Sep 17 00:00:00 2001
-From: Justus Winter <4winter@informatik.uni-hamburg.de>
-Date: Sat, 21 Feb 2015 15:20:46 +0100
-Subject: [PATCH gnumach 3/3] vm: evict clean pages first
-
-* vm/vm_pageout.c (vm_pageout_scan): Evict clean pages from the list
-of clean pages first, without requiring an expensive scan through the
-inactive list.
----
- vm/vm_pageout.c | 24 +++++++++++++++++++++++-
- 1 file changed, 23 insertions(+), 1 deletion(-)
-
-diff --git a/vm/vm_pageout.c b/vm/vm_pageout.c
-index a8db604..5fc8106 100644
---- a/vm/vm_pageout.c
-+++ b/vm/vm_pageout.c
-@@ -679,6 +679,28 @@ void vm_pageout_scan(void)
- 			/*NOTREACHED*/
- 		}
- 
-+		/* Try to evict a clean page first.  */
-+		simple_lock (&vm_page_queue_clean_lock);
-+		int tries;
-+		for (tries = vm_page_clean_count; tries; tries--)
-+		  {
-+		    assert (! queue_empty (&vm_page_queue_clean));
-+		    queue_remove_first (&vm_page_queue_clean,
-+					m, vm_page_t, cleanq);
-+		    if (! m->active && m->inactive
-+			&& (want_pages || m->external))
-+		      {
-+			m->cleanq.next = NULL;
-+			vm_page_clean_count -= 1;
-+			simple_unlock (&vm_page_queue_clean_lock);
-+			goto got_one;
-+		      }
-+		    else
-+		      queue_enter (&vm_page_queue_clean,
-+				   m, vm_page_t, cleanq);
-+		  }
-+		simple_unlock (&vm_page_queue_clean_lock);
-+
- 		vm_pageout_inactive++;
- 
- 		/* Find a page we are interested in paging out.  If we
-@@ -695,7 +717,7 @@ void vm_pageout_scan(void)
- 		    if (!m)
- 		      goto pause;
- 		  }
--		
-+	got_one:
- 		object = m->object;
- 
- 		/*
--- 
-2.1.4
-