lockdep_assert_held(&line->lock);
- if (!vsc) {
+ if (line->w_err_gc->has_write_err) {
+ if (line->gc_group != PBLK_LINEGC_WERR) {
+ line->gc_group = PBLK_LINEGC_WERR;
+ move_list = &l_mg->gc_werr_list;
+ pblk_rl_werr_line_in(&pblk->rl);
+ }
+ } else if (!vsc) {
if (line->gc_group != PBLK_LINEGC_FULL) {
line->gc_group = PBLK_LINEGC_FULL;
move_list = &l_mg->gc_full_list;
line->state = PBLK_LINESTATE_FREE;
line->gc_group = PBLK_LINEGC_NONE;
pblk_line_free(line);
- spin_unlock(&line->lock);
+ if (line->w_err_gc->has_write_err) {
+ pblk_rl_werr_line_out(&pblk->rl);
+ line->w_err_gc->has_write_err = 0;
+ }
+
+ spin_unlock(&line->lock);
atomic_dec(&gc->pipeline_gc);
spin_lock(&l_mg->free_lock);
spin_lock(&l_mg->close_lock);
spin_lock(&line->lock);
+
+ /* Update the in-memory start address for emeta, in case it has
+ * shifted due to write errors
+ */
+ if (line->emeta_ssec != line->cur_sec)
+ line->emeta_ssec = line->cur_sec;
+
list_add_tail(&line->list, &l_mg->emeta_list);
spin_unlock(&line->lock);
spin_unlock(&l_mg->close_lock);
pblk_line_should_sync_meta(pblk);
+
+
+}
+
+static void pblk_save_lba_list(struct pblk *pblk, struct pblk_line *line)
+{
+ struct pblk_line_meta *lm = &pblk->lm;
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ unsigned int lba_list_size = lm->emeta_len[2];
+ struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
+ struct pblk_emeta *emeta = line->emeta;
+
+ w_err_gc->lba_list = pblk_malloc(lba_list_size,
+ l_mg->emeta_alloc_type, GFP_KERNEL);
+ memcpy(w_err_gc->lba_list, emeta_to_lbas(pblk, emeta->buf),
+ lba_list_size);
}
void pblk_line_close_ws(struct work_struct *work)
ws);
struct pblk *pblk = line_ws->pblk;
struct pblk_line *line = line_ws->line;
+ struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
+
+ /* Write errors makes the emeta start address stored in smeta invalid,
+ * so keep a copy of the lba list until we've gc'd the line
+ */
+ if (w_err_gc->has_write_err)
+ pblk_save_lba_list(pblk, line);
pblk_line_close(pblk, line);
mempool_free(line_ws, &pblk->gen_ws_pool);
kfree(gc_rq_ws);
}
+static __le64 *get_lba_list_from_emeta(struct pblk *pblk,
+ struct pblk_line *line)
+{
+ struct line_emeta *emeta_buf;
+ struct pblk_line_mgmt *l_mg = &pblk->l_mg;
+ struct pblk_line_meta *lm = &pblk->lm;
+ unsigned int lba_list_size = lm->emeta_len[2];
+ __le64 *lba_list;
+ int ret;
+
+ emeta_buf = pblk_malloc(lm->emeta_len[0],
+ l_mg->emeta_alloc_type, GFP_KERNEL);
+ if (!emeta_buf)
+ return NULL;
+
+ ret = pblk_line_read_emeta(pblk, line, emeta_buf);
+ if (ret) {
+ pr_err("pblk: line %d read emeta failed (%d)\n",
+ line->id, ret);
+ pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
+ return NULL;
+ }
+
+ /* If this read fails, it means that emeta is corrupted.
+ * For now, leave the line untouched.
+ * TODO: Implement a recovery routine that scans and moves
+ * all sectors on the line.
+ */
+
+ ret = pblk_recov_check_emeta(pblk, emeta_buf);
+ if (ret) {
+ pr_err("pblk: inconsistent emeta (line %d)\n",
+ line->id);
+ pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
+ return NULL;
+ }
+
+ lba_list = pblk_malloc(lba_list_size,
+ l_mg->emeta_alloc_type, GFP_KERNEL);
+ if (lba_list)
+ memcpy(lba_list, emeta_to_lbas(pblk, emeta_buf), lba_list_size);
+
+ pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
+
+ return lba_list;
+}
+
static void pblk_gc_line_prepare_ws(struct work_struct *work)
{
struct pblk_line_ws *line_ws = container_of(work, struct pblk_line_ws,
struct pblk_line_mgmt *l_mg = &pblk->l_mg;
struct pblk_line_meta *lm = &pblk->lm;
struct pblk_gc *gc = &pblk->gc;
- struct line_emeta *emeta_buf;
struct pblk_line_ws *gc_rq_ws;
struct pblk_gc_rq *gc_rq;
__le64 *lba_list;
unsigned long *invalid_bitmap;
int sec_left, nr_secs, bit;
- int ret;
invalid_bitmap = kmalloc(lm->sec_bitmap_len, GFP_KERNEL);
if (!invalid_bitmap)
goto fail_free_ws;
- emeta_buf = pblk_malloc(lm->emeta_len[0], l_mg->emeta_alloc_type,
- GFP_KERNEL);
- if (!emeta_buf) {
- pr_err("pblk: cannot use GC emeta\n");
- goto fail_free_bitmap;
- }
-
- ret = pblk_line_read_emeta(pblk, line, emeta_buf);
- if (ret) {
- pr_err("pblk: line %d read emeta failed (%d)\n", line->id, ret);
- goto fail_free_emeta;
- }
-
- /* If this read fails, it means that emeta is corrupted. For now, leave
- * the line untouched. TODO: Implement a recovery routine that scans and
- * moves all sectors on the line.
- */
-
- ret = pblk_recov_check_emeta(pblk, emeta_buf);
- if (ret) {
- pr_err("pblk: inconsistent emeta (line %d)\n", line->id);
- goto fail_free_emeta;
- }
-
- lba_list = emeta_to_lbas(pblk, emeta_buf);
- if (!lba_list) {
- pr_err("pblk: could not interpret emeta (line %d)\n", line->id);
- goto fail_free_emeta;
+ if (line->w_err_gc->has_write_err) {
+ lba_list = line->w_err_gc->lba_list;
+ line->w_err_gc->lba_list = NULL;
+ } else {
+ lba_list = get_lba_list_from_emeta(pblk, line);
+ if (!lba_list) {
+ pr_err("pblk: could not interpret emeta (line %d)\n",
+ line->id);
+ goto fail_free_ws;
+ }
}
spin_lock(&line->lock);
if (sec_left < 0) {
pr_err("pblk: corrupted GC line (%d)\n", line->id);
- goto fail_free_emeta;
+ goto fail_free_lba_list;
}
bit = -1;
next_rq:
gc_rq = kmalloc(sizeof(struct pblk_gc_rq), GFP_KERNEL);
if (!gc_rq)
- goto fail_free_emeta;
+ goto fail_free_lba_list;
nr_secs = 0;
do {
goto next_rq;
out:
- pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
+ pblk_mfree(lba_list, l_mg->emeta_alloc_type);
kfree(line_ws);
kfree(invalid_bitmap);
fail_free_gc_rq:
kfree(gc_rq);
-fail_free_emeta:
- pblk_mfree(emeta_buf, l_mg->emeta_alloc_type);
-fail_free_bitmap:
+fail_free_lba_list:
+ pblk_mfree(lba_list, l_mg->emeta_alloc_type);
kfree(invalid_bitmap);
fail_free_ws:
kfree(line_ws);
static bool pblk_gc_should_run(struct pblk_gc *gc, struct pblk_rl *rl)
{
unsigned int nr_blocks_free, nr_blocks_need;
+ unsigned int werr_lines = atomic_read(&rl->werr_lines);
nr_blocks_need = pblk_rl_high_thrs(rl);
nr_blocks_free = pblk_rl_nr_free_blks(rl);
/* This is not critical, no need to take lock here */
- return ((gc->gc_active) && (nr_blocks_need > nr_blocks_free));
+ return ((werr_lines > 0) ||
+ ((gc->gc_active) && (nr_blocks_need > nr_blocks_free)));
}
void pblk_gc_free_full_lines(struct pblk *pblk)
}
}
-static void pblk_line_meta_free(struct pblk_line *line)
+static void pblk_line_meta_free(struct pblk_line_mgmt *l_mg,
+ struct pblk_line *line)
{
+ struct pblk_w_err_gc *w_err_gc = line->w_err_gc;
+
kfree(line->blk_bitmap);
kfree(line->erase_bitmap);
kfree(line->chks);
+
+ pblk_mfree(w_err_gc->lba_list, l_mg->emeta_alloc_type);
+ kfree(w_err_gc);
}
static void pblk_lines_free(struct pblk *pblk)
line = &pblk->lines[i];
pblk_line_free(line);
- pblk_line_meta_free(line);
+ pblk_line_meta_free(l_mg, line);
}
spin_unlock(&l_mg->free_lock);
return -ENOMEM;
line->erase_bitmap = kzalloc(lm->blk_bitmap_len, GFP_KERNEL);
- if (!line->erase_bitmap) {
- kfree(line->blk_bitmap);
- return -ENOMEM;
- }
+ if (!line->erase_bitmap)
+ goto free_blk_bitmap;
+
line->chks = kmalloc(lm->blk_per_line * sizeof(struct nvm_chk_meta),
GFP_KERNEL);
- if (!line->chks) {
- kfree(line->erase_bitmap);
- kfree(line->blk_bitmap);
- return -ENOMEM;
- }
+ if (!line->chks)
+ goto free_erase_bitmap;
+
+ line->w_err_gc = kzalloc(sizeof(struct pblk_w_err_gc), GFP_KERNEL);
+ if (!line->w_err_gc)
+ goto free_chks;
return 0;
+
+free_chks:
+ kfree(line->chks);
+free_erase_bitmap:
+ kfree(line->erase_bitmap);
+free_blk_bitmap:
+ kfree(line->blk_bitmap);
+ return -ENOMEM;
}
static int pblk_line_mg_init(struct pblk *pblk)
INIT_LIST_HEAD(&l_mg->gc_mid_list);
INIT_LIST_HEAD(&l_mg->gc_low_list);
INIT_LIST_HEAD(&l_mg->gc_empty_list);
+ INIT_LIST_HEAD(&l_mg->gc_werr_list);
INIT_LIST_HEAD(&l_mg->emeta_list);
- l_mg->gc_lists[0] = &l_mg->gc_high_list;
- l_mg->gc_lists[1] = &l_mg->gc_mid_list;
- l_mg->gc_lists[2] = &l_mg->gc_low_list;
+ l_mg->gc_lists[0] = &l_mg->gc_werr_list;
+ l_mg->gc_lists[1] = &l_mg->gc_high_list;
+ l_mg->gc_lists[2] = &l_mg->gc_mid_list;
+ l_mg->gc_lists[3] = &l_mg->gc_low_list;
spin_lock_init(&l_mg->free_lock);
spin_lock_init(&l_mg->close_lock);
fail_free_lines:
while (--i >= 0)
- pblk_line_meta_free(&pblk->lines[i]);
+ pblk_line_meta_free(l_mg, &pblk->lines[i]);
kfree(pblk->lines);
fail_free_chunk_meta:
kfree(chunk_meta);
pblk_rl_kick_u_timer(rl);
}
+void pblk_rl_werr_line_in(struct pblk_rl *rl)
+{
+ atomic_inc(&rl->werr_lines);
+}
+
+void pblk_rl_werr_line_out(struct pblk_rl *rl)
+{
+ atomic_dec(&rl->werr_lines);
+}
+
void pblk_rl_gc_in(struct pblk_rl *rl, int nr_entries)
{
atomic_add(nr_entries, &rl->rb_gc_cnt);
{
struct pblk *pblk = container_of(rl, struct pblk, rl);
int max = rl->rb_budget;
+ int werr_gc_needed = atomic_read(&rl->werr_lines);
if (free_blocks >= rl->high) {
- rl->rb_user_max = max;
- rl->rb_gc_max = 0;
- rl->rb_state = PBLK_RL_HIGH;
+ if (werr_gc_needed) {
+ /* Allocate a small budget for recovering
+ * lines with write errors
+ */
+ rl->rb_gc_max = 1 << rl->rb_windows_pw;
+ rl->rb_user_max = max - rl->rb_gc_max;
+ rl->rb_state = PBLK_RL_WERR;
+ } else {
+ rl->rb_user_max = max;
+ rl->rb_gc_max = 0;
+ rl->rb_state = PBLK_RL_OFF;
+ }
} else if (free_blocks < rl->high) {
int shift = rl->high_pw - rl->rb_windows_pw;
int user_windows = free_blocks >> shift;
rl->rb_state = PBLK_RL_LOW;
}
- if (rl->rb_state == (PBLK_RL_MID | PBLK_RL_LOW))
+ if (rl->rb_state != PBLK_RL_OFF)
pblk_gc_should_start(pblk);
else
pblk_gc_should_stop(pblk);
atomic_set(&rl->rb_user_cnt, 0);
atomic_set(&rl->rb_gc_cnt, 0);
atomic_set(&rl->rb_space, -1);
+ atomic_set(&rl->werr_lines, 0);
timer_setup(&rl->u_timer, pblk_rl_u_timer, 0);
int free_line_cnt = 0, closed_line_cnt = 0, emeta_line_cnt = 0;
int d_line_cnt = 0, l_line_cnt = 0;
int gc_full = 0, gc_high = 0, gc_mid = 0, gc_low = 0, gc_empty = 0;
+ int gc_werr = 0;
+
int bad = 0, cor = 0;
int msecs = 0, cur_sec = 0, vsc = 0, sec_in_line = 0;
int map_weight = 0, meta_weight = 0;
gc_empty++;
}
+ list_for_each_entry(line, &l_mg->gc_werr_list, list) {
+ if (line->type == PBLK_LINETYPE_DATA)
+ d_line_cnt++;
+ else if (line->type == PBLK_LINETYPE_LOG)
+ l_line_cnt++;
+ closed_line_cnt++;
+ gc_werr++;
+ }
+
list_for_each_entry(line, &l_mg->bad_list, list)
bad++;
list_for_each_entry(line, &l_mg->corrupt_list, list)
l_mg->nr_lines);
sz += snprintf(page + sz, PAGE_SIZE - sz,
- "GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, queue:%d\n",
- gc_full, gc_high, gc_mid, gc_low, gc_empty,
+ "GC: full:%d, high:%d, mid:%d, low:%d, empty:%d, werr: %d, queue:%d\n",
+ gc_full, gc_high, gc_mid, gc_low, gc_empty, gc_werr,
atomic_read(&pblk->gc.read_inflight_gc));
sz += snprintf(page + sz, PAGE_SIZE - sz,
}
}
+ line->w_err_gc->has_write_err = 1;
spin_unlock(&line->lock);
}
if (rqd->error) {
pblk_log_write_err(pblk, rqd);
pr_err("pblk: metadata I/O failed. Line %d\n", line->id);
+ line->w_err_gc->has_write_err = 1;
}
sync = atomic_add_return(rqd->nr_ppas, &emeta->sync);
/* The number of GC lists and the rate-limiter states go together. This way the
* rate-limiter can dictate how much GC is needed based on resource utilization.
*/
-#define PBLK_GC_NR_LISTS 3
+#define PBLK_GC_NR_LISTS 4
enum {
- PBLK_RL_HIGH = 1,
- PBLK_RL_MID = 2,
- PBLK_RL_LOW = 3,
+ PBLK_RL_OFF = 0,
+ PBLK_RL_WERR = 1,
+ PBLK_RL_HIGH = 2,
+ PBLK_RL_MID = 3,
+ PBLK_RL_LOW = 4
};
#define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS)
int rb_user_active;
int rb_gc_active;
+ atomic_t werr_lines; /* Number of write error lines that needs gc */
+
struct timer_list u_timer;
unsigned long long nr_secs;
PBLK_LINEGC_MID = 23,
PBLK_LINEGC_HIGH = 24,
PBLK_LINEGC_FULL = 25,
+ PBLK_LINEGC_WERR = 26
};
#define PBLK_MAGIC 0x70626c6b /*pblk*/
struct line_smeta *buf; /* smeta buffer in persistent format */
};
+struct pblk_w_err_gc {
+ int has_write_err;
+ __le64 *lba_list;
+};
+
struct pblk_line {
struct pblk *pblk;
unsigned int id; /* Line number corresponds to the
struct kref ref; /* Write buffer L2P references */
+ struct pblk_w_err_gc *w_err_gc; /* Write error gc recovery metadata */
+
spinlock_t lock; /* Necessary for invalid_bitmap only */
};
struct list_head gc_mid_list; /* Full lines ready to GC, mid isc */
struct list_head gc_low_list; /* Full lines ready to GC, low isc */
+ struct list_head gc_werr_list; /* Write err recovery list */
+
struct list_head gc_full_list; /* Full lines ready to GC, no valid */
struct list_head gc_empty_list; /* Full lines close, all valid */
bool used);
int pblk_rl_is_limit(struct pblk_rl *rl);
+void pblk_rl_werr_line_in(struct pblk_rl *rl);
+void pblk_rl_werr_line_out(struct pblk_rl *rl);
+
/*
* pblk sysfs
*/
projects / openwrt / staging / blogic.git / commitdiff