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From: Alexander Motin <mav@FreeBSD.org>
Date: Fri, 27 Mar 2015 08:57:38 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r280748 - stable/10/usr.sbin/bhyve
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Author: mav
Date: Fri Mar 27 08:57:38 2015
New Revision: 280748
URL: https://svnweb.freebsd.org/changeset/base/280748

Log:
  MFC r280126: Pre-allocate one extra request per processing thread.
  
  Processing threads call callbacks before freeing requests.  As result,
  new requests may arrive before old ones are freed.

Modified:
  stable/10/usr.sbin/bhyve/block_if.c
Directory Properties:
  stable/10/   (props changed)

Modified: stable/10/usr.sbin/bhyve/block_if.c
==============================================================================
--- stable/10/usr.sbin/bhyve/block_if.c	Fri Mar 27 08:56:44 2015	(r280747)
+++ stable/10/usr.sbin/bhyve/block_if.c	Fri Mar 27 08:57:38 2015	(r280748)
@@ -54,8 +54,8 @@ __FBSDID("$FreeBSD$");
 
 #define BLOCKIF_SIG	0xb109b109
 
-#define BLOCKIF_MAXREQ	64
 #define BLOCKIF_NUMTHR	8
+#define BLOCKIF_MAXREQ	(64 + BLOCKIF_NUMTHR)
 
 enum blockop {
 	BOP_READ,