MFV r348576: 9963 Seperate tunable for disabling ZIL vdev flush
illumos/illumos-gate@f8fdf68125 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>
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commit
a66a7143d4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=348577
@ -217,6 +217,15 @@ SYSCTL_INT(_vfs_zfs, OID_AUTO, standard_sm_blksz, CTLFLAG_RDTUN,
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&vdev_standard_sm_blksz, 0,
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&vdev_standard_sm_blksz, 0,
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"Block size for standard space map. Power of 2 and greater than 4096.");
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"Block size for standard space map. Power of 2 and greater than 4096.");
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/*
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* Tunable parameter for debugging or performance analysis. Setting this
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* will cause pool corruption on power loss if a volatile out-of-order
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* write cache is enabled.
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*/
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boolean_t zfs_nocacheflush = B_FALSE;
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SYSCTL_INT(_vfs_zfs, OID_AUTO, cache_flush_disable, CTLFLAG_RWTUN,
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&zfs_nocacheflush, 0, "Disable cache flush");
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/*PRINTFLIKE2*/
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/*PRINTFLIKE2*/
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void
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void
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vdev_dbgmsg(vdev_t *vd, const char *fmt, ...)
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vdev_dbgmsg(vdev_t *vd, const char *fmt, ...)
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@ -239,6 +239,10 @@ vdev_file_io_start(zio_t *zio)
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switch (zio->io_cmd) {
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switch (zio->io_cmd) {
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case DKIOCFLUSHWRITECACHE:
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case DKIOCFLUSHWRITECACHE:
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if (zfs_nocacheflush)
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break;
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zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC,
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zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC,
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kcred, NULL);
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kcred, NULL);
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break;
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break;
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@ -98,13 +98,15 @@ SYSCTL_INT(_vfs_zfs, OID_AUTO, zil_replay_disable, CTLFLAG_RWTUN,
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&zil_replay_disable, 0, "Disable intent logging replay");
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&zil_replay_disable, 0, "Disable intent logging replay");
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/*
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/*
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* Tunable parameter for debugging or performance analysis. Setting
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* Disable the DKIOCFLUSHWRITECACHE commands that are normally sent to
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* zfs_nocacheflush will cause corruption on power loss if a volatile
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* the disk(s) by the ZIL after an LWB write has completed. Setting this
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* out-of-order write cache is enabled.
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* will cause ZIL corruption on power loss if a volatile out-of-order
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* write cache is enabled.
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*/
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*/
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boolean_t zfs_nocacheflush = B_FALSE;
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boolean_t zil_nocacheflush = B_FALSE;
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SYSCTL_INT(_vfs_zfs, OID_AUTO, cache_flush_disable, CTLFLAG_RWTUN,
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SYSCTL_INT(_vfs_zfs, OID_AUTO, zil_nocacheflush, CTLFLAG_RWTUN,
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&zfs_nocacheflush, 0, "Disable cache flush");
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&zil_nocacheflush, 0, "Disable ZIL cache flush");
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boolean_t zfs_trim_enabled = B_TRUE;
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boolean_t zfs_trim_enabled = B_TRUE;
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SYSCTL_DECL(_vfs_zfs_trim);
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SYSCTL_DECL(_vfs_zfs_trim);
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SYSCTL_INT(_vfs_zfs_trim, OID_AUTO, enabled, CTLFLAG_RDTUN, &zfs_trim_enabled, 0,
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SYSCTL_INT(_vfs_zfs_trim, OID_AUTO, enabled, CTLFLAG_RDTUN, &zfs_trim_enabled, 0,
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@ -989,7 +991,7 @@ zil_lwb_add_block(lwb_t *lwb, const blkptr_t *bp)
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int ndvas = BP_GET_NDVAS(bp);
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int ndvas = BP_GET_NDVAS(bp);
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int i;
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int i;
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if (zfs_nocacheflush)
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if (zil_nocacheflush)
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return;
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return;
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mutex_enter(&lwb->lwb_vdev_lock);
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mutex_enter(&lwb->lwb_vdev_lock);
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@ -1013,7 +1015,7 @@ zil_lwb_add_txg(lwb_t *lwb, uint64_t txg)
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/*
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/*
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* This function is a called after all VDEVs associated with a given lwb
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* This function is a called after all VDEVs associated with a given lwb
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* write have completed their DKIOCFLUSHWRITECACHE command; or as soon
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* write have completed their DKIOCFLUSHWRITECACHE command; or as soon
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* as the lwb write completes, if "zfs_nocacheflush" is set.
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* as the lwb write completes, if "zil_nocacheflush" is set.
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*
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*
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* The intention is for this function to be called as soon as the
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* The intention is for this function to be called as soon as the
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* contents of an lwb are considered "stable" on disk, and will survive
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* contents of an lwb are considered "stable" on disk, and will survive
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