Ok, Now we try to acquire the lock and refuse to dump if we don't get
the lock.
--- 2569+mjb1/drivers/dump/dump_blockdev.c.orig Wed May 14 13:23:36 2003
+++ 2569+mjb1/drivers/dump/dump_blockdev.c Thu May 15 09:26:12 2003
@@ -258,10 +258,19 @@
dump_block_silence(struct dump_dev *dev)
{
struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
+ struct request_queue *q = bdev_get_queue(dump_bdev->bdev);
+ int ret;
+
+ /* If we can't get request queue lock, refuse to take the dump */
+ if (!spin_trylock(q->queue_lock))
+ return -EBUSY;
+
+ ret = elv_queue_empty(q);
+ spin_unlock(q->queue_lock);
/* For now we assume we have the device to ourselves */
/* Just a quick sanity check */
- if (!blk_queue_empty(bdev_get_queue(dump_bdev->bdev))) {
+ if (!ret) {
/* i/o in flight - safer to quit */
return -EBUSY;
}
Regards,
Bharata.
-
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