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FTL: Add fast shutdown path

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Adds the ability to persist only the most important metadata. The rest
is stored in shared memory.

Signed-off-by: Kozlowski Mateusz <mateusz.kozlowski@intel.com>
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Change-Id: I4084c04ba09115a7a08ff66fd33552a2ec60d801
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/13360
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Kozlowski Mateusz 2022-06-01 11:03:05 +02:00 committed by Ben Walker
parent ef93cc38ee
commit b5e2c59ad6
3 changed files with 104 additions and 1 deletions
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48
lib/ftl/mngt/ftl_mngt_md.c
View File

@ -138,6 +138,16 @@ ftl_mngt_persist_nv_cache_metadata(struct spdk_ftl_dev *dev, struct ftl_mngt_pro
persist(dev, mngt, FTL_LAYOUT_REGION_TYPE_NVC_MD);
}
static void
ftl_mngt_fast_persist_nv_cache_metadata(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
{
if (ftl_nv_cache_save_state(&dev->nv_cache)) {
ftl_mngt_fail_step(mngt);
return;
}
ftl_mngt_next_step(mngt);
}
static void
ftl_mngt_persist_vld_map_metadata(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
{
@ -223,6 +233,33 @@ ftl_mngt_persist_md(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
ftl_mngt_call_process(mngt, &desc_persist);
}
/*
* Fast clean shutdown path - skips the persistance of most metadata regions and
* relies on their shared memory state instead.
*/
static const struct ftl_mngt_process_desc desc_fast_persist = {
.name = "Fast persist metadata",
.steps = {
{
.name = "Fast persist NV cache metadata",
.action = ftl_mngt_fast_persist_nv_cache_metadata,
},
#ifdef SPDK_FTL_VSS_EMU
{
.name = "Persist VSS metadata",
.action = ftl_mngt_persist_vss,
},
#endif
{}
}
};
void
ftl_mngt_fast_persist_md(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
{
ftl_mngt_call_process(mngt, &desc_fast_persist);
}
void
ftl_mngt_init_default_sb(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
{
@ -274,6 +311,17 @@ ftl_mngt_set_clean(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
dev->sb_shm->shm_ready = false;
}
void
ftl_mngt_set_shm_clean(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
{
struct ftl_superblock *sb = dev->sb;
sb->clean = 1;
dev->sb_shm->shm_clean = true;
sb->header.crc = get_sb_crc(sb);
ftl_mngt_next_step(mngt);
}
/*
* Initializes the superblock fields during first startup of FTL
*/

53
lib/ftl/mngt/ftl_mngt_shutdown.c
View File

@ -55,8 +55,59 @@ static const struct ftl_mngt_process_desc desc_shutdown = {
}
};
/*
* Steps executed during fast clean shutdown (shutting down to shared memory). Utilizes
* minimum amount of metadata persistence and rolls back any setup steps executed during
* startup (closing bdevs, io channels, etc)
*/
static const struct ftl_mngt_process_desc desc_fast_shutdown = {
.name = "FTL fast shutdown",
.steps = {
{
.name = "Deinit core IO channel",
.action = ftl_mngt_deinit_io_channel
},
{
.name = "Unregister IO device",
.action = ftl_mngt_unregister_io_device
},
{
.name = "Stop core poller",
.action = ftl_mngt_stop_core_poller
},
{
.name = "Fast persist metadata",
.action = ftl_mngt_fast_persist_md
},
{
.name = "Set FTL SHM clean state",
.action = ftl_mngt_set_shm_clean
},
{
.name = "Dump statistics",
.action = ftl_mngt_dump_stats
},
{
.name = "Deinitialize L2P",
.action = ftl_mngt_deinit_l2p
},
{
.name = "Rollback FTL device",
.action = ftl_mngt_rollback_device
},
{}
}
};
int
ftl_mngt_call_dev_shutdown(struct spdk_ftl_dev *dev, ftl_mngt_completion cb, void *cb_cntx)
{
return ftl_mngt_process_execute(dev, &desc_shutdown, cb, cb_cntx);
const struct ftl_mngt_process_desc *pdesc;
if (dev->conf.fast_shutdown) {
pdesc = &desc_fast_shutdown;
} else {
pdesc = &desc_shutdown;
}
return ftl_mngt_process_execute(dev, pdesc, cb, cb_cntx);
}

4
lib/ftl/mngt/ftl_mngt_steps.h
View File

@ -84,6 +84,8 @@ void ftl_mngt_deinit_md(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
void ftl_mngt_persist_md(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_fast_persist_md(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_rollback_device(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_dump_stats(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
@ -94,6 +96,8 @@ void ftl_mngt_set_dirty(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt)
void ftl_mngt_set_clean(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_set_shm_clean(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_init_vld_map(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);
void ftl_mngt_deinit_vld_map(struct spdk_ftl_dev *dev, struct ftl_mngt_process *mngt);