[Suspend2][ 06/32] [Suspend2] Cleanup some completed I/O

[Nigel Cunningham <nigel@suspend2.net>]

Iterate through the read_for_cleanup list, cleaning up a maximum of
submit_batch_size completed pages.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/suspend_block_io.c |   37 ++++++++++++++++++++++++++++++++++++-
 1 files changed, 36 insertions(+), 1 deletions(-)

diff --git a/kernel/power/suspend_block_io.c b/kernel/power/suspend_block_io.c
index 037535b..cfff687 100644
--- a/kernel/power/suspend_block_io.c
+++ b/kernel/power/suspend_block_io.c
@@ -229,7 +229,7 @@ static void __suspend_bio_cleanup_one(st
 	io_info->flags = 0;
 }
 
-/* suspend_bio_cleanup_one
+/* __suspend_io_cleanup
  */
 
 static int suspend_bio_cleanup_one(void *data)
@@ -275,3 +275,38 @@ static int suspend_bio_cleanup_one(void 
 	return 0;
 }
 
+/* suspend_cleanup_some_completed_io
+ *
+ * NB: This is designed so that multiple callers can be in here simultaneously.
+ */
+
+static void suspend_cleanup_some_completed_io(void)
+{
+	int num_cleaned = 0;
+	struct io_info *first;
+	unsigned long flags;
+
+	spin_lock_irqsave(&ioinfo_ready_lock, flags);
+	while(!list_empty(&ioinfo_ready_for_cleanup)) {
+		int result;
+		first = list_entry(ioinfo_ready_for_cleanup.next,
+				struct io_info, list);
+
+		BUG_ON(!test_and_clear_bit(IO_AWAITING_CLEANUP, &first->flags));
+
+		list_del_init(&first->list);
+
+		spin_unlock_irqrestore(&ioinfo_ready_lock, flags);
+
+		result = suspend_bio_cleanup_one((void *) first);
+
+		spin_lock_irqsave(&ioinfo_ready_lock, flags);
+		if (result)
+			continue;
+		num_cleaned++;
+		if (num_cleaned == submit_batch_size)
+			break;
+	}
+	spin_unlock_irqrestore(&ioinfo_ready_lock, flags);
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
-
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