* [PATCH 1/4] lightnvm: pblk: add trace events for chunk states
2018-08-29 12:31 [PATCH 0/4] Introduce trace events for pblk Hans Holmberg
@ 2018-08-29 12:31 ` Hans Holmberg
2018-08-29 12:31 ` [PATCH 2/4] lightnvm: pblk: add trace events for line state changes Hans Holmberg
` (3 subsequent siblings)
4 siblings, 0 replies; 8+ messages in thread
From: Hans Holmberg @ 2018-08-29 12:31 UTC (permalink / raw)
To: Matias Bjorling; +Cc: linux-block, linux-kernel, Javier Gonzales, Hans Holmberg
From: Hans Holmberg <hans.holmberg@cnexlabs.com>
Introduce trace points for tracking chunk states in pblk - this is
useful for inspection of the entire state of the drive, and real handy
for both fw and pblk debugging.
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 35 +++++++++++++++++++++++++++-
drivers/lightnvm/pblk-init.c | 4 ++++
drivers/lightnvm/pblk-trace.h | 53 +++++++++++++++++++++++++++++++++++++++++++
drivers/lightnvm/pblk-write.c | 10 ++++++--
drivers/lightnvm/pblk.h | 8 +++++++
5 files changed, 107 insertions(+), 3 deletions(-)
create mode 100644 drivers/lightnvm/pblk-trace.h
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index f7bff3ae52ac..4da37e29bb06 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -16,7 +16,10 @@
*
*/
+#define CREATE_TRACE_POINTS
+
#include "pblk.h"
+#include "pblk-trace.h"
static void pblk_line_mark_bb(struct work_struct *work)
{
@@ -93,6 +96,9 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
chunk->state = NVM_CHK_ST_FREE;
}
+ trace_pblk_chunk_state(pblk_disk_name(pblk), &rqd->ppa_addr,
+ chunk->state);
+
atomic_dec(&pblk->inflight_io);
}
@@ -477,9 +483,30 @@ int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd)
return nvm_submit_io(dev, rqd);
}
+void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd)
+{
+ struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
+
+ int i;
+
+ for (i = 0; i < rqd->nr_ppas; i++) {
+ struct ppa_addr *ppa = &ppa_list[i];
+ struct nvm_chk_meta *chunk = pblk_dev_ppa_to_chunk(pblk, *ppa);
+ u64 caddr = pblk_dev_ppa_to_chunk_addr(pblk, *ppa);
+
+ if (caddr == 0)
+ trace_pblk_chunk_state(pblk_disk_name(pblk),
+ ppa, NVM_CHK_ST_OPEN);
+ else if (caddr == chunk->cnlb)
+ trace_pblk_chunk_state(pblk_disk_name(pblk),
+ ppa, NVM_CHK_ST_CLOSED);
+ }
+}
+
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
{
struct nvm_tgt_dev *dev = pblk->dev;
+ int ret;
atomic_inc(&pblk->inflight_io);
@@ -488,7 +515,13 @@ int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd)
return NVM_IO_ERR;
#endif
- return nvm_submit_io_sync(dev, rqd);
+ ret = nvm_submit_io_sync(dev, rqd);
+
+ if (trace_pblk_chunk_state_enabled() && !ret &&
+ rqd->opcode == NVM_OP_PWRITE)
+ pblk_check_chunk_state_update(pblk, rqd);
+
+ return ret;
}
static void pblk_bio_map_addr_endio(struct bio *bio)
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 0be64220b5d8..3f8bae9be852 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -19,6 +19,7 @@
*/
#include "pblk.h"
+#include "pblk-trace.h"
static unsigned int write_buffer_size;
@@ -650,6 +651,9 @@ static int pblk_setup_line_meta_chk(struct pblk *pblk, struct pblk_line *line,
chunk->cnlb = chunk_meta->cnlb;
chunk->wp = chunk_meta->wp;
+ trace_pblk_chunk_state(pblk_disk_name(pblk), &ppa,
+ chunk->state);
+
if (chunk->type & NVM_CHK_TP_SZ_SPEC) {
WARN_ONCE(1, "pblk: custom-sized chunks unsupported\n");
continue;
diff --git a/drivers/lightnvm/pblk-trace.h b/drivers/lightnvm/pblk-trace.h
new file mode 100644
index 000000000000..d985b729428f
--- /dev/null
+++ b/drivers/lightnvm/pblk-trace.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM pblk
+
+#if !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_PBLK_H
+
+#include <linux/tracepoint.h>
+
+struct ppa_addr;
+
+#define show_chunk_flags(state) __print_flags(state, "", \
+ { NVM_CHK_ST_FREE, "FREE", }, \
+ { NVM_CHK_ST_CLOSED, "CLOSED", }, \
+ { NVM_CHK_ST_OPEN, "OPEN", }, \
+ { NVM_CHK_ST_OFFLINE, "OFFLINE", })
+
+TRACE_EVENT(pblk_chunk_state,
+
+ TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
+
+ TP_ARGS(name, ppa, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(u64, ppa)
+ __field(int, state);
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ppa = ppa->ppa;
+ __entry->state = state;
+ ),
+
+ TP_printk("dev=%s grp=%llu pu=%llu chk=%llu state=%s", __get_str(name),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.grp),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.pu),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.chk),
+ show_chunk_flags((int)__entry->state))
+
+);
+
+
+#endif /* !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ) */
+
+/* This part must be outside protection */
+
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH ../../../drivers/lightnvm
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE pblk-trace
+#include <trace/define_trace.h>
diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
index 8aa4b9ee5092..bb656cbd5d3e 100644
--- a/drivers/lightnvm/pblk-write.c
+++ b/drivers/lightnvm/pblk-write.c
@@ -16,6 +16,7 @@
*/
#include "pblk.h"
+#include "pblk-trace.h"
static unsigned long pblk_end_w_bio(struct pblk *pblk, struct nvm_rq *rqd,
struct pblk_c_ctx *c_ctx)
@@ -278,11 +279,13 @@ static void pblk_end_io_write(struct nvm_rq *rqd)
if (rqd->error) {
pblk_end_w_fail(pblk, rqd);
return;
- }
+ } else {
+ if (trace_pblk_chunk_state_enabled())
+ pblk_check_chunk_state_update(pblk, rqd);
#ifdef CONFIG_NVM_PBLK_DEBUG
- else
WARN_ONCE(rqd->bio->bi_status, "pblk: corrupted write error\n");
#endif
+ }
pblk_complete_write(pblk, rqd, c_ctx);
atomic_dec(&pblk->inflight_io);
@@ -303,6 +306,9 @@ static void pblk_end_io_write_meta(struct nvm_rq *rqd)
pblk_log_write_err(pblk, rqd);
pblk_err(pblk, "metadata I/O failed. Line %d\n", line->id);
line->w_err_gc->has_write_err = 1;
+ } else {
+ if (trace_pblk_chunk_state_enabled())
+ pblk_check_chunk_state_update(pblk, rqd);
}
sync = atomic_add_return(rqd->nr_ppas, &emeta->sync);
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index 1bdac22e7897..ed17db2cae2c 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -785,6 +785,7 @@ void pblk_log_read_err(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_io_sync(struct pblk *pblk, struct nvm_rq *rqd);
int pblk_submit_meta_io(struct pblk *pblk, struct pblk_line *meta_line);
+void pblk_check_chunk_state_update(struct pblk *pblk, struct nvm_rq *rqd);
struct bio *pblk_bio_map_addr(struct pblk *pblk, void *data,
unsigned int nr_secs, unsigned int len,
int alloc_type, gfp_t gfp_mask);
@@ -1440,4 +1441,11 @@ static inline void pblk_setup_uuid(struct pblk *pblk)
uuid_le_gen(&uuid);
memcpy(pblk->instance_uuid, uuid.b, 16);
}
+
+static inline char *pblk_disk_name(struct pblk *pblk)
+{
+ struct gendisk *disk = pblk->disk;
+
+ return disk->disk_name;
+}
#endif /* PBLK_H_ */
--
2.7.4
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 2/4] lightnvm: pblk: add trace events for line state changes
2018-08-29 12:31 [PATCH 0/4] Introduce trace events for pblk Hans Holmberg
2018-08-29 12:31 ` [PATCH 1/4] lightnvm: pblk: add trace events for chunk states Hans Holmberg
@ 2018-08-29 12:31 ` Hans Holmberg
2018-08-29 12:31 ` [PATCH 3/4] lightnvm: pblk: add trace events for pblk " Hans Holmberg
` (2 subsequent siblings)
4 siblings, 0 replies; 8+ messages in thread
From: Hans Holmberg @ 2018-08-29 12:31 UTC (permalink / raw)
To: Matias Bjorling; +Cc: linux-block, linux-kernel, Javier Gonzales, Hans Holmberg
From: Hans Holmberg <hans.holmberg@cnexlabs.com>
Add trace events for logging for line state changes.
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 19 ++++++++++++++++++-
drivers/lightnvm/pblk-gc.c | 8 ++++++++
drivers/lightnvm/pblk-init.c | 3 +++
drivers/lightnvm/pblk-recovery.c | 6 ++++++
drivers/lightnvm/pblk-trace.h | 33 +++++++++++++++++++++++++++++++++
5 files changed, 68 insertions(+), 1 deletion(-)
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 4da37e29bb06..05775a279b20 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -413,6 +413,9 @@ struct list_head *pblk_line_gc_list(struct pblk *pblk, struct pblk_line *line)
}
} else {
line->state = PBLK_LINESTATE_CORRUPT;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
+
line->gc_group = PBLK_LINEGC_NONE;
move_list = &l_mg->corrupt_list;
pblk_err(pblk, "corrupted vsc for line %d, vsc:%d (%d/%d/%d)\n",
@@ -1019,6 +1022,8 @@ static int pblk_line_init_metadata(struct pblk *pblk, struct pblk_line *line,
spin_lock(&l_mg->free_lock);
spin_lock(&line->lock);
line->state = PBLK_LINESTATE_BAD;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
spin_unlock(&line->lock);
list_add_tail(&line->list, &l_mg->bad_list);
@@ -1166,6 +1171,8 @@ static int pblk_line_init_bb(struct pblk *pblk, struct pblk_line *line,
bitmap_weight(line->invalid_bitmap, lm->sec_per_line)) {
spin_lock(&line->lock);
line->state = PBLK_LINESTATE_BAD;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
spin_unlock(&line->lock);
list_add_tail(&line->list, &l_mg->bad_list);
@@ -1218,6 +1225,8 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
if (line->state == PBLK_LINESTATE_NEW) {
blk_to_erase = pblk_prepare_new_line(pblk, line);
line->state = PBLK_LINESTATE_FREE;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
} else {
blk_to_erase = blk_in_line;
}
@@ -1235,6 +1244,8 @@ static int pblk_line_prepare(struct pblk *pblk, struct pblk_line *line)
}
line->state = PBLK_LINESTATE_OPEN;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
atomic_set(&line->left_eblks, blk_to_erase);
atomic_set(&line->left_seblks, blk_to_erase);
@@ -1331,6 +1342,8 @@ struct pblk_line *pblk_line_get(struct pblk *pblk)
if (unlikely(bit >= lm->blk_per_line)) {
spin_lock(&line->lock);
line->state = PBLK_LINESTATE_BAD;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
spin_unlock(&line->lock);
list_add_tail(&line->list, &l_mg->bad_list);
@@ -1650,6 +1663,8 @@ static void __pblk_line_put(struct pblk *pblk, struct pblk_line *line)
spin_lock(&line->lock);
WARN_ON(line->state != PBLK_LINESTATE_GC);
line->state = PBLK_LINESTATE_FREE;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
line->gc_group = PBLK_LINEGC_NONE;
pblk_line_free(line);
@@ -1779,7 +1794,6 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
WARN_ON(line->state != PBLK_LINESTATE_OPEN);
line->state = PBLK_LINESTATE_CLOSED;
move_list = pblk_line_gc_list(pblk, line);
-
list_add_tail(&line->list, move_list);
mempool_free(line->map_bitmap, l_mg->bitmap_pool);
@@ -1798,6 +1812,9 @@ void pblk_line_close(struct pblk *pblk, struct pblk_line *line)
spin_unlock(&line->lock);
spin_unlock(&l_mg->gc_lock);
+
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
}
void pblk_line_close_meta(struct pblk *pblk, struct pblk_line *line)
diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index 157c2567c9e8..b841d84c4342 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -16,8 +16,10 @@
*/
#include "pblk.h"
+#include "pblk-trace.h"
#include <linux/delay.h>
+
static void pblk_gc_free_gc_rq(struct pblk_gc_rq *gc_rq)
{
if (gc_rq->data)
@@ -64,6 +66,8 @@ static void pblk_put_line_back(struct pblk *pblk, struct pblk_line *line)
spin_lock(&line->lock);
WARN_ON(line->state != PBLK_LINESTATE_GC);
line->state = PBLK_LINESTATE_CLOSED;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
move_list = pblk_line_gc_list(pblk, line);
spin_unlock(&line->lock);
@@ -405,6 +409,8 @@ void pblk_gc_free_full_lines(struct pblk *pblk)
spin_lock(&line->lock);
WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
line->state = PBLK_LINESTATE_GC;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
spin_unlock(&line->lock);
list_del(&line->list);
@@ -451,6 +457,8 @@ static void pblk_gc_run(struct pblk *pblk)
spin_lock(&line->lock);
WARN_ON(line->state != PBLK_LINESTATE_CLOSED);
line->state = PBLK_LINESTATE_GC;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
spin_unlock(&line->lock);
list_del(&line->list);
diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index 3f8bae9be852..ddbd91d80119 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -971,6 +971,9 @@ static int pblk_lines_init(struct pblk *pblk)
goto fail_free_lines;
nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
+
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
}
if (!nr_free_chks) {
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index eea901d7cebc..f4c5318e99d7 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -15,6 +15,7 @@
*/
#include "pblk.h"
+#include "pblk-trace.h"
int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf)
{
@@ -932,6 +933,8 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
spin_lock(&line->lock);
line->state = PBLK_LINESTATE_CLOSED;
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
move_list = pblk_line_gc_list(pblk, line);
spin_unlock(&line->lock);
@@ -947,6 +950,9 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
if (open_lines > 1)
pblk_err(pblk, "failed to recover L2P\n");
+ trace_pblk_line_state(pblk_disk_name(pblk), line->id,
+ line->state);
+
open_lines++;
line->meta_line = meta_line;
data_line = line;
diff --git a/drivers/lightnvm/pblk-trace.h b/drivers/lightnvm/pblk-trace.h
index d985b729428f..f9aa9e25e428 100644
--- a/drivers/lightnvm/pblk-trace.h
+++ b/drivers/lightnvm/pblk-trace.h
@@ -15,6 +15,16 @@ struct ppa_addr;
{ NVM_CHK_ST_OPEN, "OPEN", }, \
{ NVM_CHK_ST_OFFLINE, "OFFLINE", })
+#define show_line_state(state) __print_symbolic(state, \
+ { PBLK_LINESTATE_NEW, "NEW", }, \
+ { PBLK_LINESTATE_FREE, "FREE", }, \
+ { PBLK_LINESTATE_OPEN, "OPEN", }, \
+ { PBLK_LINESTATE_CLOSED, "CLOSED", }, \
+ { PBLK_LINESTATE_GC, "GC", }, \
+ { PBLK_LINESTATE_BAD, "BAD", }, \
+ { PBLK_LINESTATE_CORRUPT, "CORRUPT" })
+
+
TRACE_EVENT(pblk_chunk_state,
TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
@@ -41,6 +51,29 @@ TRACE_EVENT(pblk_chunk_state,
);
+TRACE_EVENT(pblk_line_state,
+
+ TP_PROTO(const char *name, int line, int state),
+
+ TP_ARGS(name, line, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(int, line)
+ __field(int, state);
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->line = line;
+ __entry->state = state;
+ ),
+
+ TP_printk("dev=%s line=%d state=%s", __get_str(name),
+ (int)__entry->line,
+ show_line_state((int)__entry->state))
+
+);
#endif /* !defined(_TRACE_PBLK_H) || defined(TRACE_HEADER_MULTI_READ) */
--
2.7.4
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 3/4] lightnvm: pblk: add trace events for pblk state changes
2018-08-29 12:31 [PATCH 0/4] Introduce trace events for pblk Hans Holmberg
2018-08-29 12:31 ` [PATCH 1/4] lightnvm: pblk: add trace events for chunk states Hans Holmberg
2018-08-29 12:31 ` [PATCH 2/4] lightnvm: pblk: add trace events for line state changes Hans Holmberg
@ 2018-08-29 12:31 ` Hans Holmberg
2018-08-29 12:31 ` [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets Hans Holmberg
2018-08-29 14:22 ` [PATCH 0/4] Introduce trace events for pblk Matias Bjørling
4 siblings, 0 replies; 8+ messages in thread
From: Hans Holmberg @ 2018-08-29 12:31 UTC (permalink / raw)
To: Matias Bjorling; +Cc: linux-block, linux-kernel, Javier Gonzales, Hans Holmberg
From: Hans Holmberg <hans.holmberg@cnexlabs.com>
Add trace events for tracking pblk state changes.
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 3 +++
drivers/lightnvm/pblk-init.c | 1 +
drivers/lightnvm/pblk-trace.h | 28 ++++++++++++++++++++++++++++
3 files changed, 32 insertions(+)
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 05775a279b20..566a5d3165ee 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 ddbd91d80119..d0546213c64f 100644
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -1093,6 +1093,7 @@ 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 */
--
2.7.4
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets
2018-08-29 12:31 [PATCH 0/4] Introduce trace events for pblk Hans Holmberg
` (2 preceding siblings ...)
2018-08-29 12:31 ` [PATCH 3/4] lightnvm: pblk: add trace events for pblk " Hans Holmberg
@ 2018-08-29 12:31 ` Hans Holmberg
2018-08-29 20:09 ` Javier Gonzalez
2018-08-29 14:22 ` [PATCH 0/4] Introduce trace events for pblk Matias Bjørling
4 siblings, 1 reply; 8+ messages in thread
From: Hans Holmberg @ 2018-08-29 12:31 UTC (permalink / raw)
To: Matias Bjorling; +Cc: linux-block, linux-kernel, Javier Gonzales, Hans Holmberg
From: Hans Holmberg <hans.holmberg@cnexlabs.com>
Trace state of chunk resets.
Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
---
drivers/lightnvm/pblk-core.c | 12 ++++++++++++
drivers/lightnvm/pblk-trace.h | 31 +++++++++++++++++++++++++++++++
drivers/lightnvm/pblk.h | 6 ++++++
3 files changed, 49 insertions(+)
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index 566a5d3165ee..b874001d1175 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -90,9 +90,15 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
atomic_dec(&line->left_seblks);
if (rqd->error) {
+ trace_pblk_chunk_reset(pblk_disk_name(pblk),
+ &rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
+
chunk->state = NVM_CHK_ST_OFFLINE;
pblk_mark_bb(pblk, line, rqd->ppa_addr);
} else {
+ trace_pblk_chunk_reset(pblk_disk_name(pblk),
+ &rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
+
chunk->state = NVM_CHK_ST_FREE;
}
@@ -958,6 +964,9 @@ int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
spin_unlock(&line->lock);
+ trace_pblk_chunk_reset(pblk_disk_name(pblk),
+ &ppa, PBLK_CHUNK_RESET_START);
+
ret = pblk_blk_erase_sync(pblk, ppa);
if (ret) {
pblk_err(pblk, "failed to erase line %d\n", line->id);
@@ -1736,6 +1745,9 @@ int pblk_blk_erase_async(struct pblk *pblk, struct ppa_addr ppa)
rqd->end_io = pblk_end_io_erase;
rqd->private = pblk;
+ trace_pblk_chunk_reset(pblk_disk_name(pblk),
+ &ppa, PBLK_CHUNK_RESET_START);
+
/* The write thread schedules erases so that it minimizes disturbances
* with writes. Thus, there is no need to take the LUN semaphore.
*/
diff --git a/drivers/lightnvm/pblk-trace.h b/drivers/lightnvm/pblk-trace.h
index c171d0450c07..679e5c458ca6 100644
--- a/drivers/lightnvm/pblk-trace.h
+++ b/drivers/lightnvm/pblk-trace.h
@@ -31,6 +31,37 @@ struct ppa_addr;
{ PBLK_STATE_RECOVERING, "RECOVERING", }, \
{ PBLK_STATE_STOPPED, "STOPPED" })
+#define show_chunk_erase_state(state) __print_symbolic(state, \
+ { PBLK_CHUNK_RESET_START, "START", }, \
+ { PBLK_CHUNK_RESET_DONE, "OK", }, \
+ { PBLK_CHUNK_RESET_FAILED, "FAILED" })
+
+
+TRACE_EVENT(pblk_chunk_reset,
+
+ TP_PROTO(const char *name, struct ppa_addr *ppa, int state),
+
+ TP_ARGS(name, ppa, state),
+
+ TP_STRUCT__entry(
+ __string(name, name)
+ __field(u64, ppa)
+ __field(int, state);
+ ),
+
+ TP_fast_assign(
+ __assign_str(name, name);
+ __entry->ppa = ppa->ppa;
+ __entry->state = state;
+ ),
+
+ TP_printk("dev=%s grp=%llu pu=%llu chk=%llu state=%s", __get_str(name),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.grp),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.pu),
+ (u64)(((struct ppa_addr *)(&__entry->ppa))->m.chk),
+ show_chunk_erase_state((int)__entry->state))
+
+);
TRACE_EVENT(pblk_chunk_state,
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index ed17db2cae2c..6195e3f5d2e6 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -79,6 +79,12 @@ enum {
PBLK_BLK_ST_CLOSED = 0x2,
};
+enum {
+ PBLK_CHUNK_RESET_START,
+ PBLK_CHUNK_RESET_DONE,
+ PBLK_CHUNK_RESET_FAILED,
+};
+
struct pblk_sec_meta {
u64 reserved;
__le64 lba;
--
2.7.4
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets
2018-08-29 12:31 ` [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets Hans Holmberg
@ 2018-08-29 20:09 ` Javier Gonzalez
2018-09-04 10:39 ` Hans Holmberg
0 siblings, 1 reply; 8+ messages in thread
From: Javier Gonzalez @ 2018-08-29 20:09 UTC (permalink / raw)
To: Hans Holmberg
Cc: Matias Bjørling, linux-block, linux-kernel, Hans Holmberg
[-- Attachment #1: Type: text/plain, Size: 1654 bytes --]
> On 29 Aug 2018, at 14.31, Hans Holmberg <hans.ml.holmberg@owltronix.com> wrote:
>
> From: Hans Holmberg <hans.holmberg@cnexlabs.com>
>
> Trace state of chunk resets.
>
> Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
> ---
> drivers/lightnvm/pblk-core.c | 12 ++++++++++++
> drivers/lightnvm/pblk-trace.h | 31 +++++++++++++++++++++++++++++++
> drivers/lightnvm/pblk.h | 6 ++++++
> 3 files changed, 49 insertions(+)
>
> diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> index 566a5d3165ee..b874001d1175 100644
> --- a/drivers/lightnvm/pblk-core.c
> +++ b/drivers/lightnvm/pblk-core.c
> @@ -90,9 +90,15 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
> atomic_dec(&line->left_seblks);
>
> if (rqd->error) {
> + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> + &rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
> +
> chunk->state = NVM_CHK_ST_OFFLINE;
> pblk_mark_bb(pblk, line, rqd->ppa_addr);
> } else {
> + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> + &rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
> +
> chunk->state = NVM_CHK_ST_FREE;
> }
>
> @@ -958,6 +964,9 @@ int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
> WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
> spin_unlock(&line->lock);
>
> + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> + &ppa, PBLK_CHUNK_RESET_START);
> +
Can you move this inside of pblk_blk_erase_sync() instead? I was looking
at the code now to implement a different thing and it is confusing to
see tracing inside erase_async and not in erase_sync.
Thanks,
Javier
[-- Attachment #2: Message signed with OpenPGP --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
^ permalink raw reply [flat|nested] 8+ messages in thread* Re: [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets
2018-08-29 20:09 ` Javier Gonzalez
@ 2018-09-04 10:39 ` Hans Holmberg
0 siblings, 0 replies; 8+ messages in thread
From: Hans Holmberg @ 2018-09-04 10:39 UTC (permalink / raw)
To: Javier Gonzalez
Cc: Matias Bjorling, linux-block, Linux Kernel Mailing List, Hans Holmberg
On Wed, Aug 29, 2018 at 10:09 PM Javier Gonzalez <javier@cnexlabs.com> wrote:
>
> > On 29 Aug 2018, at 14.31, Hans Holmberg <hans.ml.holmberg@owltronix.com> wrote:
> >
> > From: Hans Holmberg <hans.holmberg@cnexlabs.com>
> >
> > Trace state of chunk resets.
> >
> > Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
> > ---
> > drivers/lightnvm/pblk-core.c | 12 ++++++++++++
> > drivers/lightnvm/pblk-trace.h | 31 +++++++++++++++++++++++++++++++
> > drivers/lightnvm/pblk.h | 6 ++++++
> > 3 files changed, 49 insertions(+)
> >
> > diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
> > index 566a5d3165ee..b874001d1175 100644
> > --- a/drivers/lightnvm/pblk-core.c
> > +++ b/drivers/lightnvm/pblk-core.c
> > @@ -90,9 +90,15 @@ static void __pblk_end_io_erase(struct pblk *pblk, struct nvm_rq *rqd)
> > atomic_dec(&line->left_seblks);
> >
> > if (rqd->error) {
> > + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> > + &rqd->ppa_addr, PBLK_CHUNK_RESET_FAILED);
> > +
> > chunk->state = NVM_CHK_ST_OFFLINE;
> > pblk_mark_bb(pblk, line, rqd->ppa_addr);
> > } else {
> > + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> > + &rqd->ppa_addr, PBLK_CHUNK_RESET_DONE);
> > +
> > chunk->state = NVM_CHK_ST_FREE;
> > }
> >
> > @@ -958,6 +964,9 @@ int pblk_line_erase(struct pblk *pblk, struct pblk_line *line)
> > WARN_ON(test_and_set_bit(bit, line->erase_bitmap));
> > spin_unlock(&line->lock);
> >
> > + trace_pblk_chunk_reset(pblk_disk_name(pblk),
> > + &ppa, PBLK_CHUNK_RESET_START);
> > +
>
> Can you move this inside of pblk_blk_erase_sync() instead? I was looking
> at the code now to implement a different thing and it is confusing to
> see tracing inside erase_async and not in erase_sync.
>
Fixed in a V2. Thanks.
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 0/4] Introduce trace events for pblk
2018-08-29 12:31 [PATCH 0/4] Introduce trace events for pblk Hans Holmberg
` (3 preceding siblings ...)
2018-08-29 12:31 ` [PATCH 4/4] lightnvm: pblk: add tracing for chunk resets Hans Holmberg
@ 2018-08-29 14:22 ` Matias Bjørling
4 siblings, 0 replies; 8+ messages in thread
From: Matias Bjørling @ 2018-08-29 14:22 UTC (permalink / raw)
To: hans.ml.holmberg; +Cc: linux-block, linux-kernel, javier, hans.holmberg
On 08/29/2018 02:31 PM, Hans Holmberg wrote:
> From: Hans Holmberg <hans.holmberg@cnexlabs.com>
>
> This patchset adds trace events for tracking the internal state of
> pblk. I've used the events extensively the last few months, and
> they have proven very useful.
>
> The patches depend on some of Javier's for-4.20 patches.
> For ordering, see:
>
> Branch: for-4.20/pblk
> Remote: ssh://github.com/OpenChannelSSD/linux
>
> Hans Holmberg (4):
> lightnvm: pblk: add trace events for chunk states
> lightnvm: pblk: add trace events for line state changes
> lightnvm: pblk: add trace events for pblk state changes
> lightnvm: pblk: add tracing for chunk resets
>
> drivers/lightnvm/pblk-core.c | 69 ++++++++++++++++++-
> drivers/lightnvm/pblk-gc.c | 8 +++
> drivers/lightnvm/pblk-init.c | 8 +++
> drivers/lightnvm/pblk-recovery.c | 6 ++
> drivers/lightnvm/pblk-trace.h | 145 +++++++++++++++++++++++++++++++++++++++
> drivers/lightnvm/pblk-write.c | 10 ++-
> drivers/lightnvm/pblk.h | 14 ++++
> 7 files changed, 256 insertions(+), 4 deletions(-)
> create mode 100644 drivers/lightnvm/pblk-trace.h
>
Thanks. Applied for 4.20.
^ permalink raw reply [flat|nested] 8+ messages in thread