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From: Jim Harris <jimharris@FreeBSD.org>
Date: Mon, 11 Jan 2016 17:20:30 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r293663 - stable/10/sys/dev/nvd
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Author: jimharris
Date: Mon Jan 11 17:20:30 2016
New Revision: 293663
URL: https://svnweb.freebsd.org/changeset/base/293663

Log:
  MFC r293320:
  
    nvd: do not wait for previous bios before submitting ordered bio
  
    Still wait until all in-flight bios (including the ordered bio)
    complete before processing more bios from the queue.

Modified:
  stable/10/sys/dev/nvd/nvd.c

Modified: stable/10/sys/dev/nvd/nvd.c
==============================================================================
--- stable/10/sys/dev/nvd/nvd.c	Mon Jan 11 17:19:11 2016	(r293662)
+++ stable/10/sys/dev/nvd/nvd.c	Mon Jan 11 17:20:30 2016	(r293663)
@@ -204,19 +204,6 @@ nvd_bioq_process(void *arg, int pending)
 		if (bp == NULL)
 			break;
 
-#ifdef BIO_ORDERED
-		/*
-		 * BIO_ORDERED flag dictates that all outstanding bios
-		 *  must be completed before processing the bio with
-		 *  BIO_ORDERED flag set.
-		 */
-		if (bp->bio_flags & BIO_ORDERED) {
-			while (ndisk->cur_depth > 0) {
-				pause("nvd flush", 1);
-			}
-		}
-#endif
-
 		bp->bio_driver1 = NULL;
 		atomic_add_int(&ndisk->cur_depth, 1);