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authorHans Holmberg <hans.holmberg@cnexlabs.com>2018-10-09 14:11:54 +0300
committerJens Axboe <axboe@kernel.dk>2018-10-09 17:25:07 +0300
commit1b0dd0bf3dc8e9fb974d61139c182be15e43caf9 (patch)
treee50053b339986748faa9ca738f295ea40cfc6494 /drivers/lightnvm
parentf29372322e415999f429d3e3883b865c87860b46 (diff)
downloadlinux-1b0dd0bf3dc8e9fb974d61139c182be15e43caf9.tar.xz
lightnvm: pblk: add trace events for pblk state changes
Add trace events for tracking pblk state changes. Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com> Signed-off-by: Matias Bjørling <mb@lightnvm.io> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/pblk-core.c3
-rw-r--r--drivers/lightnvm/pblk-init.c1
-rw-r--r--drivers/lightnvm/pblk-trace.h28
3 files changed, 32 insertions, 0 deletions
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index ef52c1647f88..c482ef7dd4b5 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -1503,6 +1503,7 @@ static void pblk_stop_writes(struct pblk *pblk, struct pblk_line *line)
pblk_set_space_limit(pblk);
pblk->state = PBLK_STATE_STOPPING;
+ trace_pblk_state(pblk_disk_name(pblk), pblk->state);
}
static void pblk_line_close_meta_sync(struct pblk *pblk)
@@ -1552,6 +1553,7 @@ void __pblk_pipeline_flush(struct pblk *pblk)
return;
}
pblk->state = PBLK_STATE_RECOVERING;
+ trace_pblk_state(pblk_disk_name(pblk), pblk->state);
spin_unlock(&l_mg->free_lock);
pblk_flush_writer(pblk);
@@ -1573,6 +1575,7 @@ void __pblk_pipeline_stop(struct pblk *pblk)
spin_lock(&l_mg->free_lock);
pblk->state = PBLK_STATE_STOPPED;
+ trace_pblk_state(pblk_disk_name(pblk), pblk->state);
l_mg->data_line = NULL;
l_mg->data_next = NULL;
spin_unlock(&l_mg->free_lock);
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index fca37da16266..9aebdee8e4c9 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -1109,6 +1109,7 @@ static void *pblk_init(struct nvm_tgt_dev *dev, struct gendisk *tdisk,
pblk->dev = dev;
pblk->disk = tdisk;
pblk->state = PBLK_STATE_RUNNING;
+ trace_pblk_state(pblk_disk_name(pblk), pblk->state);
pblk->gc.gc_enabled = 0;
if (!(geo->version == NVM_OCSSD_SPEC_12 ||
diff --git a/drivers/lightnvm/pblk-trace.h b/drivers/lightnvm/pblk-trace.h
index f9aa9e25e428..c171d0450c07 100644
--- a/drivers/lightnvm/pblk-trace.h
+++ b/drivers/lightnvm/pblk-trace.h
@@ -25,6 +25,13 @@ struct ppa_addr;
{ PBLK_LINESTATE_CORRUPT, "CORRUPT" })
+#define show_pblk_state(state) __print_symbolic(state, \
+ { PBLK_STATE_RUNNING, "RUNNING", }, \
+ { PBLK_STATE_STOPPING, "STOPPING", }, \
+ { PBLK_STATE_RECOVERING, "RECOVERING", }, \
+ { PBLK_STATE_STOPPED, "STOPPED" })
+
+
TRACE_EVENT(pblk_chunk_state,
TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
@@ -75,6 +82,27 @@ TRACE_EVENT(pblk_line_state,
);
+TRACE_EVENT(pblk_state,
+
+ TP_PROTO(const char *name, int state),
+
+ TP_ARGS(name, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(int, state);
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->state = state;
+ ),
+
+ TP_printk("dev=%s state=%s", __get_str(name),
+ show_pblk_state((int)__entry->state))
+
+);
+
#endif /* !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ) */
/* This part must be outside protection */