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Date:      Mon, 4 Feb 2019 16:51:20 +0000
From:      Steven Hartland <steven.hartland@multiplay.co.uk>
To:        Alexander Motin <mav@FreeBSD.org>, src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject:   Re: svn commit: r343745 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
Message-ID:  <aa9faa98-c3f1-c609-40d0-a234da419721@multiplay.co.uk>
In-Reply-To: <201902041613.x14GDf4k022902@repo.freebsd.org>
References:  <201902041613.x14GDf4k022902@repo.freebsd.org>

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On 04/02/2019 16:13, Alexander Motin wrote:
> Author: mav
> Date: Mon Feb  4 16:13:41 2019
> New Revision: 343745
> URL: https://svnweb.freebsd.org/changeset/base/343745
>
> Log:
>    Add missed tunables/sysctls for some new vdev variables.
>    
>    While there, make few existing sysctls writeable, since there is no reason
>    not to.
>    
>    MFC after:	1 week
>
> Modified:
>    head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
>
> Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c
> ==============================================================================
> --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c	Mon Feb  4 16:02:03 2019	(r343744)
> +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c	Mon Feb  4 16:13:41 2019	(r343745)
> @@ -165,29 +165,38 @@ static vdev_ops_t *vdev_ops_table[] = {
>   
>   /* target number of metaslabs per top-level vdev */
>   int vdev_max_ms_count = 200;
> -SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, max_ms_count, CTLFLAG_RDTUN,
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, max_ms_count, CTLFLAG_RWTUN,
>       &vdev_max_ms_count, 0,
> -    "Maximum number of metaslabs per top-level vdev");
> +    "Target number of metaslabs per top-level vdev");
>   
>   /* minimum number of metaslabs per top-level vdev */
>   int vdev_min_ms_count = 16;
> -SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, min_ms_count, CTLFLAG_RDTUN,
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, min_ms_count, CTLFLAG_RWTUN,
>       &vdev_min_ms_count, 0,
>       "Minimum number of metaslabs per top-level vdev");
>   
>   /* practical upper limit of total metaslabs per top-level vdev */
>   int vdev_ms_count_limit = 1ULL << 17;
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, max_ms_count_limit, CTLFLAG_RWTUN,
> +    &vdev_ms_count_limit, 0,
> +    "Maximum number of metaslabs per top-level vdev");
>   
>   /* lower limit for metaslab size (512M) */
>   int vdev_default_ms_shift = 29;
> -SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, default_ms_shift, CTLFLAG_RDTUN,
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, default_ms_shift, CTLFLAG_RWTUN,
>       &vdev_default_ms_shift, 0,
> -    "Shift between vdev size and number of metaslabs");
> +    "Default shift between vdev size and number of metaslabs");
>   
>   /* upper limit for metaslab size (256G) */
>   int vdev_max_ms_shift = 38;
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, max_ms_shift, CTLFLAG_RWTUN,
> +    &vdev_max_ms_shift, 0,
> +    "Maximal shift between vdev size and number of metaslabs");
It's a just a nit but I believe this should Maximum, like the others, 
instead of Maximal.
>   
>   boolean_t vdev_validate_skip = B_FALSE;
> +SYSCTL_INT(_vfs_zfs_vdev, OID_AUTO, validate_skip, CTLFLAG_RWTUN,
> +    &vdev_validate_skip, 0,
> +    "Bypass vdev validation");
>   
>   /*
>    * Since the DTL space map of a vdev is not expected to have a lot of
>




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