diff options
Diffstat (limited to 'debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch')
| -rw-r--r-- | debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch | 329 |
1 files changed, 0 insertions, 329 deletions
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 6131d9e..0000000 --- a/debian/patches/vm-cache-policy0002-vm-keep-track-of-clean-pages.patch +++ /dev/null @@ -1,329 +0,0 @@ -From 0866003d27e57e0baf4fd34ae905fe4ae207f623 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 | 8 ++++---- - vm/vm_resident.c | 10 ++++++++++ - xen/block.c | 2 +- - 10 files changed, 56 insertions(+), 17 deletions(-) - -diff --git a/linux/dev/glue/block.c b/linux/dev/glue/block.c -index 74126eb..9cd04cc 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 097ed23..7a0dbb8 100644 ---- a/vm/memory_object.c -+++ b/vm/memory_object.c -@@ -209,7 +209,7 @@ 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; -@@ -555,7 +555,7 @@ 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 46779f6..b3f92b3 100644 ---- a/vm/vm_fault.c -+++ b/vm/vm_fault.c -@@ -976,7 +976,7 @@ 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(); - - /* -@@ -1075,7 +1075,7 @@ 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); - -@@ -1955,7 +1955,7 @@ 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 3a231de..6bbf614 100644 ---- a/vm/vm_map.c -+++ b/vm/vm_map.c -@@ -2947,7 +2947,7 @@ 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 d9a9411..4f9376a 100644 ---- a/vm/vm_object.c -+++ b/vm/vm_object.c -@@ -581,7 +581,7 @@ 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; -@@ -1083,7 +1083,7 @@ 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 5e1ad1d..6ea2951 100644 ---- a/vm/vm_pageout.c -+++ b/vm/vm_pageout.c -@@ -293,7 +293,7 @@ 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; -@@ -306,7 +306,7 @@ vm_pageout_setup( - vm_page_copy(m, new_m); - - vm_object_lock(old_object); -- m->dirty = FALSE; -+ vm_page_mark_dirty (m, FALSE); - pmap_clear_modify(m->phys_addr); - - /* -@@ -336,7 +336,7 @@ 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); - } -@@ -780,7 +780,7 @@ 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 - |