android: binder: Add shrinker tracepoints
Add tracepoints in binder transaction allocator to
record lru hits and alloc/free page.
Signed-off-by: Sherry Yang <sherryy@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
index 11a08bf..78c42c0 100644
--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c
@@ -237,18 +237,25 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
for (page_addr = start; page_addr < end; page_addr += PAGE_SIZE) {
int ret;
bool on_lru;
+ size_t index;
- page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
+ index = (page_addr - alloc->buffer) / PAGE_SIZE;
+ page = &alloc->pages[index];
if (page->page_ptr) {
+ trace_binder_alloc_lru_start(alloc, index);
+
on_lru = list_lru_del(&binder_alloc_lru, &page->lru);
WARN_ON(!on_lru);
+
+ trace_binder_alloc_lru_end(alloc, index);
continue;
}
if (WARN_ON(!vma))
goto err_page_ptr_cleared;
+ trace_binder_alloc_page_start(alloc, index);
page->page_ptr = alloc_page(GFP_KERNEL |
__GFP_HIGHMEM |
__GFP_ZERO);
@@ -278,6 +285,8 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
alloc->pid, user_page_addr);
goto err_vm_insert_page_failed;
}
+
+ trace_binder_alloc_page_end(alloc, index);
/* vm_insert_page does not seem to increment the refcount */
}
if (mm) {
@@ -290,11 +299,17 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate,
for (page_addr = end - PAGE_SIZE; page_addr >= start;
page_addr -= PAGE_SIZE) {
bool ret;
+ size_t index;
- page = &alloc->pages[(page_addr - alloc->buffer) / PAGE_SIZE];
+ index = (page_addr - alloc->buffer) / PAGE_SIZE;
+ page = &alloc->pages[index];
+
+ trace_binder_free_lru_start(alloc, index);
ret = list_lru_add(&binder_alloc_lru, &page->lru);
WARN_ON(!ret);
+
+ trace_binder_free_lru_end(alloc, index);
continue;
err_vm_insert_page_failed:
@@ -888,18 +903,26 @@ enum lru_status binder_alloc_free_page(struct list_head *item,
if (!down_write_trylock(&mm->mmap_sem))
goto err_down_write_mmap_sem_failed;
+ trace_binder_unmap_user_start(alloc, index);
+
zap_page_range(alloc->vma,
page_addr + alloc->user_buffer_offset,
PAGE_SIZE);
+ trace_binder_unmap_user_end(alloc, index);
+
up_write(&mm->mmap_sem);
mmput(mm);
}
+ trace_binder_unmap_kernel_start(alloc, index);
+
unmap_kernel_range(page_addr, PAGE_SIZE);
__free_page(page->page_ptr);
page->page_ptr = NULL;
+ trace_binder_unmap_kernel_end(alloc, index);
+
list_lru_isolate(lru, item);
mutex_unlock(&alloc->mutex);