From 07c7a2db50d33774a0e7c353a23a61bfb6bbbfff Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 17 Nov 2024 08:05:16 +0100 Subject: [PATCH] xfs: add a max_open_zones mount option Allow limiting the number of open zones used below that exported by the device. This is required to tune the number of write streams when zoned RT devices are used on conventional devices, and can be useful on zoned devices that support a very large number of open zones. Signed-off-by: Christoph Hellwig Reviewed-by: "Darrick J. Wong" --- fs/xfs/xfs_super.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 4ea7150692dd..aac50bdd629c 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -110,7 +110,7 @@ enum { Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota, Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, - Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, + Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum, Opt_max_open_zones, }; static const struct fs_parameter_spec xfs_fs_parameters[] = { @@ -155,6 +155,7 @@ static const struct fs_parameter_spec xfs_fs_parameters[] = { fsparam_flag("nodiscard", Opt_nodiscard), fsparam_flag("dax", Opt_dax), fsparam_enum("dax", Opt_dax_enum, dax_param_enums), + fsparam_u32("max_open_zones", Opt_max_open_zones), {} }; @@ -234,6 +235,9 @@ xfs_fs_show_options( if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) seq_puts(m, ",noquota"); + if (mp->m_max_open_zones) + seq_printf(m, ",max_open_zones=%u", mp->m_max_open_zones); + return 0; } @@ -1081,6 +1085,14 @@ xfs_finish_flags( return -EINVAL; } + if (!xfs_has_zoned(mp)) { + if (mp->m_max_open_zones) { + xfs_warn(mp, +"max_open_zones mount option only supported on zoned file systems."); + return -EINVAL; + } + } + return 0; } @@ -1463,6 +1475,9 @@ xfs_fs_parse_param( xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true); parsing_mp->m_features |= XFS_FEAT_NOATTR2; return 0; + case Opt_max_open_zones: + parsing_mp->m_max_open_zones = result.uint_32; + return 0; default: xfs_warn(parsing_mp, "unknown mount option [%s].", param->key); return -EINVAL; -- 2.50.1