Date: Tue, 11 Jun 2019 14:27:36 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r348919 - stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201906111427.x5BERajh015675@repo.freebsd.org>
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Author: mav Date: Tue Jun 11 14:27:35 2019 New Revision: 348919 URL: https://svnweb.freebsd.org/changeset/base/348919 Log: MFC r348577: MFV r348576: 9963 Seperate tunable for disabling ZIL vdev flush illumos/illumos-gate@f8fdf6812567ce1a3b76a6bee2ee3f04bd3fcaca Reviewed by: Matt Ahrens <matt@delphix.com> Reviewed by: Brad Lewis <brad.lewis@delphix.com> Reviewed by: Patrick Mooney <patrick.mooney@joyent.com> Approved by: Dan McDonald <danmcd@joyent.com> Author: Prakash Surya <prakash.surya@delphix.com> Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c ============================================================================== --- stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c Tue Jun 11 14:26:55 2019 (r348918) +++ stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev.c Tue Jun 11 14:27:35 2019 (r348919) @@ -217,6 +217,15 @@ SYSCTL_INT(_vfs_zfs, OID_AUTO, standard_sm_blksz, CTLF &vdev_standard_sm_blksz, 0, "Block size for standard space map. Power of 2 and greater than 4096."); +/* + * Tunable parameter for debugging or performance analysis. Setting this + * will cause pool corruption on power loss if a volatile out-of-order + * write cache is enabled. + */ +boolean_t zfs_nocacheflush = B_FALSE; +SYSCTL_INT(_vfs_zfs, OID_AUTO, cache_flush_disable, CTLFLAG_RWTUN, + &zfs_nocacheflush, 0, "Disable cache flush"); + /*PRINTFLIKE2*/ void vdev_dbgmsg(vdev_t *vd, const char *fmt, ...) Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c ============================================================================== --- stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c Tue Jun 11 14:26:55 2019 (r348918) +++ stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c Tue Jun 11 14:27:35 2019 (r348919) @@ -239,6 +239,10 @@ vdev_file_io_start(zio_t *zio) switch (zio->io_cmd) { case DKIOCFLUSHWRITECACHE: + + if (zfs_nocacheflush) + break; + zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC, kcred, NULL); break; Modified: stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c ============================================================================== --- stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c Tue Jun 11 14:26:55 2019 (r348918) +++ stable/12/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zil.c Tue Jun 11 14:27:35 2019 (r348919) @@ -98,13 +98,15 @@ SYSCTL_INT(_vfs_zfs, OID_AUTO, zil_replay_disable, CTL &zil_replay_disable, 0, "Disable intent logging replay"); /* - * Tunable parameter for debugging or performance analysis. Setting - * zfs_nocacheflush will cause corruption on power loss if a volatile - * out-of-order write cache is enabled. + * Disable the DKIOCFLUSHWRITECACHE commands that are normally sent to + * the disk(s) by the ZIL after an LWB write has completed. Setting this + * will cause ZIL corruption on power loss if a volatile out-of-order + * write cache is enabled. */ -boolean_t zfs_nocacheflush = B_FALSE; -SYSCTL_INT(_vfs_zfs, OID_AUTO, cache_flush_disable, CTLFLAG_RWTUN, - &zfs_nocacheflush, 0, "Disable cache flush"); +boolean_t zil_nocacheflush = B_FALSE; +SYSCTL_INT(_vfs_zfs, OID_AUTO, zil_nocacheflush, CTLFLAG_RWTUN, + &zil_nocacheflush, 0, "Disable ZIL cache flush"); + boolean_t zfs_trim_enabled = B_TRUE; SYSCTL_DECL(_vfs_zfs_trim); SYSCTL_INT(_vfs_zfs_trim, OID_AUTO, enabled, CTLFLAG_RDTUN, &zfs_trim_enabled, 0, @@ -989,7 +991,7 @@ zil_lwb_add_block(lwb_t *lwb, const blkptr_t *bp) int ndvas = BP_GET_NDVAS(bp); int i; - if (zfs_nocacheflush) + if (zil_nocacheflush) return; mutex_enter(&lwb->lwb_vdev_lock); @@ -1013,7 +1015,7 @@ zil_lwb_add_txg(lwb_t *lwb, uint64_t txg) /* * This function is a called after all VDEVs associated with a given lwb * write have completed their DKIOCFLUSHWRITECACHE command; or as soon - * as the lwb write completes, if "zfs_nocacheflush" is set. + * as the lwb write completes, if "zil_nocacheflush" is set. * * The intention is for this function to be called as soon as the * contents of an lwb are considered "stable" on disk, and will survive
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