svn commit: r358683 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Alexander Motin]

Author: mav
Date: Thu Mar  5 19:43:43 2020
New Revision: 358683
URL: https://svnweb.freebsd.org/changeset/base/358683

Log:
  Remove vfs.zfs.top_maxinflight tunable/sysctl.
  
  It is dead since sorted scrub import at r334844.
  
  MFC after:	1 week
  Sponsored by:	iXsystems, Inc.

Modified:
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c

Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c
==============================================================================
--- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c	Thu Mar  5 18:11:47 2020	(r358682)
+++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_scan.c	Thu Mar  5 19:43:43 2020	(r358683)
@@ -137,12 +137,6 @@ extern int zfs_vdev_async_write_active_min_dirty_perce
  */
 int zfs_scan_strict_mem_lim = B_FALSE;
 
-/*
- * Maximum number of parallelly executing I/Os per top-level vdev.
- * Tune with care. Very high settings (hundreds) are known to trigger
- * some firmware bugs and resets on certain SSDs.
- */
-int zfs_top_maxinflight = 32;		/* maximum I/Os per top-level */
 unsigned int zfs_resilver_delay = 2;	/* number of ticks to delay resilver -- 2 is a good number */
 unsigned int zfs_scrub_delay = 4;	/* number of ticks to delay scrub -- 4 is a good number */
 unsigned int zfs_scan_idle = 50;	/* idle window in clock ticks */
@@ -186,8 +180,6 @@ boolean_t zfs_no_scrub_io = B_FALSE; /* set to disable
 boolean_t zfs_no_scrub_prefetch = B_FALSE; /* set to disable scrub prefetch */
 
 SYSCTL_DECL(_vfs_zfs);
-SYSCTL_UINT(_vfs_zfs, OID_AUTO, top_maxinflight, CTLFLAG_RWTUN,
-    &zfs_top_maxinflight, 0, "Maximum I/Os per top-level vdev");
 SYSCTL_UINT(_vfs_zfs, OID_AUTO, resilver_delay, CTLFLAG_RWTUN,
     &zfs_resilver_delay, 0, "Number of ticks to delay resilver");
 SYSCTL_UINT(_vfs_zfs, OID_AUTO, scrub_delay, CTLFLAG_RWTUN,
@@ -1538,7 +1530,6 @@ dsl_scan_prefetch_thread(void *arg)
 	dsl_scan_t *scn = arg;
 	spa_t *spa = scn->scn_dp->dp_spa;
 	vdev_t *rvd = spa->spa_root_vdev;
-	uint64_t maxinflight = rvd->vdev_children * zfs_top_maxinflight;
 	scan_prefetch_issue_ctx_t *spic;
 
 	/* loop until we are told to stop */