X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=module%2Fzfs%2Fvdev_disk.c;h=86a089d12ddcfaa7c76bfbb5eb2b7a86a80f0bac;hb=8326eb4605a3d7c87cac15d5d11316fb99cd9ab0;hp=9ae8fbc18b47b9153ef85d9f820a9718072ffbc9;hpb=d148e95156b98ac226013d24962d1afa4a51c712;p=zfs.git

diff --git a/module/zfs/vdev_disk.c b/module/zfs/vdev_disk.c
index 9ae8fbc..86a089d 100644
--- a/module/zfs/vdev_disk.c
+++ b/module/zfs/vdev_disk.c
@@ -95,10 +95,10 @@ static void
 vdev_disk_error(zio_t *zio)
 {
 #ifdef ZFS_DEBUG
-	printk("ZFS: zio error=%d type=%d offset=%llu "
-	    "size=%llu flags=%x\n", zio->io_error, zio->io_type,
+	printk("ZFS: zio error=%d type=%d offset=%llu size=%llu "
+	    "flags=%x delay=%llu\n", zio->io_error, zio->io_type,
 	    (u_longlong_t)zio->io_offset, (u_longlong_t)zio->io_size,
-	    zio->io_flags);
+	    zio->io_flags, (u_longlong_t)zio->io_delay);
 #endif
 }
 
@@ -220,6 +220,27 @@ vdev_disk_dio_free(dio_request_t *dr)
 	          sizeof(struct bio *) * dr->dr_bio_count);
 }
 
+static int
+vdev_disk_dio_is_sync(dio_request_t *dr)
+{
+#ifdef HAVE_BIO_RW_SYNC
+	/* BIO_RW_SYNC preferred interface from 2.6.12-2.6.29 */
+        return (dr->dr_rw & (1 << BIO_RW_SYNC));
+#else
+# ifdef HAVE_BIO_RW_SYNCIO
+	/* BIO_RW_SYNCIO preferred interface from 2.6.30-2.6.35 */
+        return (dr->dr_rw & (1 << BIO_RW_SYNCIO));
+# else
+#  ifdef HAVE_REQ_SYNC
+	/* REQ_SYNC preferred interface from 2.6.36-2.6.xx */
+        return (dr->dr_rw & REQ_SYNC);
+#  else
+#   error "Unable to determine bio sync flag"
+#  endif /* HAVE_REQ_SYNC */
+# endif /* HAVE_BIO_RW_SYNC */
+#endif /* HAVE_BIO_RW_SYNCIO */
+}
+
 static void
 vdev_disk_dio_get(dio_request_t *dr)
 {
@@ -242,6 +263,8 @@ vdev_disk_dio_put(dio_request_t *dr)
 		vdev_disk_dio_free(dr);
 
 		if (zio) {
+			zio->io_delay = jiffies_to_msecs(
+			    jiffies_64 - zio->io_delay);
 			zio->io_error = error;
 			ASSERT3S(zio->io_error, >=, 0);
 			if (zio->io_error)
@@ -282,7 +305,7 @@ BIO_END_IO_PROTO(vdev_disk_physio_completion, bio, size, error)
 	rc = vdev_disk_dio_put(dr);
 
 	/* Wake up synchronous waiter this is the last outstanding bio */
-	if ((rc == 1) && (dr->dr_rw & (1 << DIO_RW_SYNCIO)))
+	if ((rc == 1) && vdev_disk_dio_is_sync(dr))
 		complete(&dr->dr_comp);
 
 	BIO_END_IO_RETURN(0);
@@ -342,15 +365,13 @@ retry:
 	if (dr == NULL)
 		return ENOMEM;
 
+	if (zio && !(zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD)))
+			bio_set_flags_failfast(bdev, &flags);
+
 	dr->dr_zio = zio;
 	dr->dr_rw = flags;
 	block_size = vdev_bdev_block_size(bdev);
 
-#ifdef BIO_RW_FAILFAST
-	if (flags & (1 << BIO_RW_FAILFAST))
-		dr->dr_rw |= 1 << BIO_RW_FAILFAST;
-#endif /* BIO_RW_FAILFAST */
-
 	/*
 	 * When the IO size exceeds the maximum bio size for the request
 	 * queue we are forced to break the IO in multiple bio's and wait
@@ -405,6 +426,8 @@ retry:
 
 	/* Extra reference to protect dio_request during submit_bio */
 	vdev_disk_dio_get(dr);
+	if (zio)
+		zio->io_delay = jiffies_64;
 
 	/* Submit all bio's associated with this dio */
 	for (i = 0; i < dr->dr_bio_count; i++)
@@ -419,7 +442,7 @@ retry:
 	 * only synchronous consumer is vdev_disk_read_rootlabel() all other
 	 * IO originating from vdev_disk_io_start() is asynchronous.
 	 */
-	if (dr->dr_rw & (1 << DIO_RW_SYNCIO)) {
+	if (vdev_disk_dio_is_sync(dr)) {
 		wait_for_completion(&dr->dr_comp);
 		error = dr->dr_error;
 		ASSERT3S(atomic_read(&dr->dr_ref), ==, 1);
@@ -434,6 +457,7 @@ int
 vdev_disk_physio(struct block_device *bdev, caddr_t kbuf,
 		 size_t size, uint64_t offset, int flags)
 {
+	bio_set_flags_failfast(bdev, &flags);
 	return __vdev_disk_physio(bdev, NULL, kbuf, size, offset, flags);
 }
 
@@ -443,6 +467,7 @@ BIO_END_IO_PROTO(vdev_disk_io_flush_completion, bio, size, rc)
 {
 	zio_t *zio = bio->bi_private;
 
+	zio->io_delay = jiffies_to_msecs(jiffies_64 - zio->io_delay);
 	zio->io_error = -rc;
 	if (rc && (rc == -EOPNOTSUPP))
 		zio->io_vd->vdev_nowritecache = B_TRUE;
@@ -473,6 +498,7 @@ vdev_disk_io_flush(struct block_device *bdev, zio_t *zio)
 	bio->bi_end_io = vdev_disk_io_flush_completion;
 	bio->bi_private = zio;
 	bio->bi_bdev = bdev;
+	zio->io_delay = jiffies_64;
 	submit_bio(WRITE_BARRIER, bio);
 
 	return 0;
@@ -540,11 +566,6 @@ vdev_disk_io_start(zio_t *zio)
 		return ZIO_PIPELINE_CONTINUE;
 	}
 
-#ifdef BIO_RW_FAILFAST
-	if (zio->io_flags & (ZIO_FLAG_IO_RETRY | ZIO_FLAG_TRYHARD))
-		flags |= (1 << BIO_RW_FAILFAST);
-#endif /* BIO_RW_FAILFAST */
-
 	error = __vdev_disk_physio(vd->vd_bdev, zio, zio->io_data,
 		                   zio->io_size, zio->io_offset, flags);
 	if (error) {