svn commit: r199454 - stable/8/sys/geom/stripe

[Alexander Motin]

Author: mav
Date: Tue Nov 17 21:42:11 2009
New Revision: 199454
URL: http://svn.freebsd.org/changeset/base/199454

Log:
  MFC r196837:
  Remove artificial MAX_IO_SIZE constant, equal to DFLTPHYS * 2. Use MAXPHYS
  instead. It is NULL change for GENERIC kernel, but allows 'fast' mode to
  work on systems with increased MAXPHYS.

Modified:
  stable/8/sys/geom/stripe/g_stripe.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/xen/xenpci/   (props changed)

Modified: stable/8/sys/geom/stripe/g_stripe.c
==============================================================================
--- stable/8/sys/geom/stripe/g_stripe.c	Tue Nov 17 21:28:59 2009	(r199453)
+++ stable/8/sys/geom/stripe/g_stripe.c	Tue Nov 17 21:42:11 2009	(r199454)
@@ -41,7 +41,6 @@ __FBSDID("$FreeBSD$");
 #include <geom/stripe/g_stripe.h>
 
 
-#define	MAX_IO_SIZE	(DFLTPHYS * 2)
 static MALLOC_DEFINE(M_STRIPE, "stripe_data", "GEOM_STRIPE Data");
 
 static uma_zone_t g_stripe_zone;
@@ -87,7 +86,7 @@ g_sysctl_stripe_fast(SYSCTL_HANDLER_ARGS
 }
 SYSCTL_PROC(_kern_geom_stripe, OID_AUTO, fast, CTLTYPE_INT | CTLFLAG_RW,
     NULL, 0, g_sysctl_stripe_fast, "I", "Fast, but memory-consuming, mode");
-static u_int g_stripe_maxmem = MAX_IO_SIZE * 100;
+static u_int g_stripe_maxmem = MAXPHYS * 100;
 TUNABLE_INT("kern.geom.stripe.maxmem", &g_stripe_maxmem);
 SYSCTL_UINT(_kern_geom_stripe, OID_AUTO, maxmem, CTLFLAG_RD, &g_stripe_maxmem,
     0, "Maximum memory that can be allocated in \"fast\" mode (in bytes)");
@@ -125,10 +124,10 @@ static void
 g_stripe_init(struct g_class *mp __unused)
 {
 
-	g_stripe_zone = uma_zcreate("g_stripe_zone", MAX_IO_SIZE, NULL, NULL,
+	g_stripe_zone = uma_zcreate("g_stripe_zone", MAXPHYS, NULL, NULL,
 	    NULL, NULL, 0, 0);
-	g_stripe_maxmem -= g_stripe_maxmem % MAX_IO_SIZE;
-	uma_zone_set_max(g_stripe_zone, g_stripe_maxmem / MAX_IO_SIZE);
+	g_stripe_maxmem -= g_stripe_maxmem % MAXPHYS;
+	uma_zone_set_max(g_stripe_zone, g_stripe_maxmem / MAXPHYS);
 }
 
 static void
@@ -613,14 +612,14 @@ g_stripe_start(struct bio *bp)
 	 * Do use "fast" mode when:
 	 * 1. "Fast" mode is ON.
 	 * and
-	 * 2. Request size is less than or equal to MAX_IO_SIZE (128kB),
+	 * 2. Request size is less than or equal to MAXPHYS,
 	 *    which should always be true.
 	 * and
 	 * 3. Request size is bigger than stripesize * ndisks. If it isn't,
 	 *    there will be no need to send more than one I/O request to
 	 *    a provider, so there is nothing to optmize.
 	 */
-	if (g_stripe_fast && bp->bio_length <= MAX_IO_SIZE &&
+	if (g_stripe_fast && bp->bio_length <= MAXPHYS &&
 	    bp->bio_length >= stripesize * sc->sc_ndisks) {
 		fast = 1;
 	}