#include "bcachefs.h"
#include "btree_key_cache.h"
#include "btree_update.h"
+#include "btree_write_buffer.h"
+#include "buckets.h"
#include "errcode.h"
#include "error.h"
#include "journal.h"
#include "journal_io.h"
#include "journal_reclaim.h"
#include "replicas.h"
-#include "super.h"
+#include "sb-members.h"
#include "trace.h"
#include <linux/kthread.h>
return available;
}
-static void journal_set_remaining(struct journal *j, unsigned u64s_remaining)
+void bch2_journal_set_watermark(struct journal *j)
{
- union journal_preres_state old, new;
- u64 v = atomic64_read(&j->prereserved.counter);
-
- do {
- old.v = new.v = v;
- new.remaining = u64s_remaining;
- } while ((v = atomic64_cmpxchg(&j->prereserved.counter,
- old.v, new.v)) != old.v);
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ bool low_on_space = j->space[journal_space_clean].total * 4 <=
+ j->space[journal_space_total].total;
+ bool low_on_pin = fifo_free(&j->pin) < j->pin.size / 4;
+ bool low_on_wb = bch2_btree_write_buffer_must_wait(c);
+ unsigned watermark = low_on_space || low_on_pin || low_on_wb
+ ? BCH_WATERMARK_reclaim
+ : BCH_WATERMARK_stripe;
+
+ if (track_event_change(&c->times[BCH_TIME_blocked_journal_low_on_space], low_on_space) ||
+ track_event_change(&c->times[BCH_TIME_blocked_journal_low_on_pin], low_on_pin) ||
+ track_event_change(&c->times[BCH_TIME_blocked_write_buffer_full], low_on_wb))
+ trace_and_count(c, journal_full, c);
+
+ swap(watermark, j->watermark);
+ if (watermark > j->watermark)
+ journal_wake(j);
}
static struct journal_space
enum journal_space_from from)
{
struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_dev *ca;
- unsigned i, pos, nr_devs = 0;
+ unsigned pos, nr_devs = 0;
struct journal_space space, dev_space[BCH_SB_MEMBERS_MAX];
BUG_ON(nr_devs_want > ARRAY_SIZE(dev_space));
rcu_read_lock();
- for_each_member_device_rcu(ca, c, i,
- &c->rw_devs[BCH_DATA_journal]) {
+ for_each_member_device_rcu(c, ca, &c->rw_devs[BCH_DATA_journal]) {
if (!ca->journal.nr)
continue;
void bch2_journal_space_available(struct journal *j)
{
struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_dev *ca;
unsigned clean, clean_ondisk, total;
- s64 u64s_remaining = 0;
unsigned max_entry_size = min(j->buf[0].buf_size >> 9,
j->buf[1].buf_size >> 9);
- unsigned i, nr_online = 0, nr_devs_want;
+ unsigned nr_online = 0, nr_devs_want;
bool can_discard = false;
int ret = 0;
lockdep_assert_held(&j->lock);
rcu_read_lock();
- for_each_member_device_rcu(ca, c, i,
- &c->rw_devs[BCH_DATA_journal]) {
+ for_each_member_device_rcu(c, ca, &c->rw_devs[BCH_DATA_journal]) {
struct journal_device *ja = &ca->journal;
if (!ja->nr)
j->can_discard = can_discard;
- if (nr_online < c->opts.metadata_replicas_required) {
+ if (nr_online < metadata_replicas_required(c)) {
ret = JOURNAL_ERR_insufficient_devices;
goto out;
}
nr_devs_want = min_t(unsigned, nr_online, c->opts.metadata_replicas);
- for (i = 0; i < journal_space_nr; i++)
+ for (unsigned i = 0; i < journal_space_nr; i++)
j->space[i] = __journal_space_available(j, nr_devs_want, i);
clean_ondisk = j->space[journal_space_clean_ondisk].total;
else
clear_bit(JOURNAL_MAY_SKIP_FLUSH, &j->flags);
- u64s_remaining = (u64) clean << 6;
- u64s_remaining -= (u64) total << 3;
- u64s_remaining = max(0LL, u64s_remaining);
- u64s_remaining /= 4;
- u64s_remaining = min_t(u64, u64s_remaining, U32_MAX);
+ bch2_journal_set_watermark(j);
out:
j->cur_entry_sectors = !ret ? j->space[journal_space_discarded].next_entry : 0;
j->cur_entry_error = ret;
- journal_set_remaining(j, u64s_remaining);
- journal_set_watermark(j);
if (!ret)
journal_wake(j);
void bch2_journal_do_discards(struct journal *j)
{
struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_dev *ca;
- unsigned iter;
mutex_lock(&j->discard_lock);
- for_each_rw_member(ca, c, iter) {
+ for_each_rw_member(c, ca) {
struct journal_device *ja = &ca->journal;
while (should_discard_bucket(j, ja)) {
* entry, holding it open to ensure it gets replayed during recovery:
*/
-static void bch2_journal_reclaim_fast(struct journal *j)
+void bch2_journal_reclaim_fast(struct journal *j)
{
- struct journal_entry_pin_list temp;
bool popped = false;
lockdep_assert_held(&j->lock);
* all btree nodes got written out
*/
while (!fifo_empty(&j->pin) &&
+ j->pin.front <= j->seq_ondisk &&
!atomic_read(&fifo_peek_front(&j->pin).count)) {
- fifo_pop(&j->pin, temp);
+ j->pin.front++;
popped = true;
}
bch2_journal_space_available(j);
}
-void __bch2_journal_pin_put(struct journal *j, u64 seq)
+bool __bch2_journal_pin_put(struct journal *j, u64 seq)
{
struct journal_entry_pin_list *pin_list = journal_seq_pin(j, seq);
- if (atomic_dec_and_test(&pin_list->count))
- bch2_journal_reclaim_fast(j);
+ return atomic_dec_and_test(&pin_list->count);
}
void bch2_journal_pin_put(struct journal *j, u64 seq)
{
- struct journal_entry_pin_list *pin_list = journal_seq_pin(j, seq);
-
- if (atomic_dec_and_test(&pin_list->count)) {
+ if (__bch2_journal_pin_put(j, seq)) {
spin_lock(&j->lock);
bch2_journal_reclaim_fast(j);
spin_unlock(&j->lock);
list_del_init(&pin->list);
/*
- * Unpinning a journal entry make make journal_next_bucket() succeed, if
+ * Unpinning a journal entry may make journal_next_bucket() succeed, if
* writing a new last_seq will now make another bucket available:
*/
return atomic_dec_and_test(&pin_list->count) &&
return JOURNAL_PIN_other;
}
-void bch2_journal_pin_set(struct journal *j, u64 seq,
+static inline void bch2_journal_pin_set_locked(struct journal *j, u64 seq,
struct journal_entry_pin *pin,
- journal_pin_flush_fn flush_fn)
+ journal_pin_flush_fn flush_fn,
+ enum journal_pin_type type)
{
- struct journal_entry_pin_list *pin_list;
- bool reclaim;
+ struct journal_entry_pin_list *pin_list = journal_seq_pin(j, seq);
+
+ /*
+ * flush_fn is how we identify journal pins in debugfs, so must always
+ * exist, even if it doesn't do anything:
+ */
+ BUG_ON(!flush_fn);
+
+ atomic_inc(&pin_list->count);
+ pin->seq = seq;
+ pin->flush = flush_fn;
+ list_add(&pin->list, &pin_list->list[type]);
+}
+void bch2_journal_pin_copy(struct journal *j,
+ struct journal_entry_pin *dst,
+ struct journal_entry_pin *src,
+ journal_pin_flush_fn flush_fn)
+{
spin_lock(&j->lock);
+ u64 seq = READ_ONCE(src->seq);
+
if (seq < journal_last_seq(j)) {
/*
* bch2_journal_pin_copy() raced with bch2_journal_pin_drop() on
return;
}
- pin_list = journal_seq_pin(j, seq);
-
- reclaim = __journal_pin_drop(j, pin);
-
- atomic_inc(&pin_list->count);
- pin->seq = seq;
- pin->flush = flush_fn;
+ bool reclaim = __journal_pin_drop(j, dst);
- if (flush_fn)
- list_add(&pin->list, &pin_list->list[journal_pin_type(flush_fn)]);
- else
- list_add(&pin->list, &pin_list->flushed);
+ bch2_journal_pin_set_locked(j, seq, dst, flush_fn, journal_pin_type(flush_fn));
if (reclaim)
bch2_journal_reclaim_fast(j);
+
+ /*
+ * If the journal is currently full, we might want to call flush_fn
+ * immediately:
+ */
+ if (seq == journal_last_seq(j))
+ journal_wake(j);
spin_unlock(&j->lock);
+}
+
+void bch2_journal_pin_set(struct journal *j, u64 seq,
+ struct journal_entry_pin *pin,
+ journal_pin_flush_fn flush_fn)
+{
+ spin_lock(&j->lock);
+ BUG_ON(seq < journal_last_seq(j));
+
+ bool reclaim = __journal_pin_drop(j, pin);
+
+ bch2_journal_pin_set_locked(j, seq, pin, flush_fn, journal_pin_type(flush_fn));
+
+ if (reclaim)
+ bch2_journal_reclaim_fast(j);
/*
* If the journal is currently full, we might want to call flush_fn
* immediately:
*/
- journal_wake(j);
+ if (seq == journal_last_seq(j))
+ journal_wake(j);
+
+ spin_unlock(&j->lock);
}
/**
* bch2_journal_pin_flush: ensure journal pin callback is no longer running
+ * @j: journal object
+ * @pin: pin to flush
*/
void bch2_journal_pin_flush(struct journal *j, struct journal_entry_pin *pin)
{
static u64 journal_seq_to_flush(struct journal *j)
{
struct bch_fs *c = container_of(j, struct bch_fs, journal);
- struct bch_dev *ca;
u64 seq_to_flush = 0;
- unsigned iter;
spin_lock(&j->lock);
- for_each_rw_member(ca, c, iter) {
+ for_each_rw_member(c, ca) {
struct journal_device *ja = &ca->journal;
unsigned nr_buckets, bucket_to_flush;
/* Try to keep the journal at most half full: */
nr_buckets = ja->nr / 2;
- /* And include pre-reservations: */
- nr_buckets += DIV_ROUND_UP(j->prereserved.reserved,
- (ca->mi.bucket_size << 6) -
- journal_entry_overhead(j));
-
nr_buckets = min(nr_buckets, ja->nr);
bucket_to_flush = (ja->cur_idx + nr_buckets) % ja->nr;
}
/**
- * bch2_journal_reclaim - free up journal buckets
+ * __bch2_journal_reclaim - free up journal buckets
+ * @j: journal object
+ * @direct: direct or background reclaim?
+ * @kicked: requested to run since we last ran?
+ * Returns: 0 on success, or -EIO if the journal has been shutdown
*
* Background journal reclaim writes out btree nodes. It should be run
* early enough so that we never completely run out of journal buckets.
msecs_to_jiffies(c->opts.journal_reclaim_delay)))
min_nr = 1;
- if (j->prereserved.reserved * 4 > j->prereserved.remaining)
- min_nr = 1;
-
- if (fifo_free(&j->pin) <= 32)
+ if (j->watermark != BCH_WATERMARK_stripe)
min_nr = 1;
if (atomic_read(&c->btree_cache.dirty) * 2 > c->btree_cache.used)
trace_and_count(c, journal_reclaim_start, c,
direct, kicked,
min_nr, min_key_cache,
- j->prereserved.reserved,
- j->prereserved.remaining,
atomic_read(&c->btree_cache.dirty),
c->btree_cache.used,
atomic_long_read(&c->btree_key_cache.nr_dirty),
p = kthread_create(bch2_journal_reclaim_thread, j,
"bch-reclaim/%s", c->name);
ret = PTR_ERR_OR_ZERO(p);
- if (ret) {
- bch_err(c, "error creating journal reclaim thread: %s", bch2_err_str(ret));
+ bch_err_msg(c, ret, "creating journal reclaim thread");
+ if (ret)
return ret;
- }
get_task_struct(p);
j->reclaim_thread = p;
(1U << JOURNAL_PIN_btree), 0, 0, 0))
*did_work = true;
+ if (seq_to_flush > journal_cur_seq(j))
+ bch2_journal_entry_close(j);
+
spin_lock(&j->lock);
/*
* If journal replay hasn't completed, the unreplayed journal entries
bool bch2_journal_flush_pins(struct journal *j, u64 seq_to_flush)
{
+ /* time_stats this */
bool did_work = false;
if (!test_bit(JOURNAL_STARTED, &j->flags))
* expects to find devices marked for journal data on unclean mount.
*/
ret = bch2_journal_meta(&c->journal);
- if (ret) {
- mutex_unlock(&c->replicas_gc_lock);
- return ret;
- }
+ if (ret)
+ goto err;
seq = 0;
spin_lock(&j->lock);
journal_seq_pin(j, seq)->devs);
seq++;
- spin_unlock(&j->lock);
- ret = bch2_mark_replicas(c, &replicas.e);
- spin_lock(&j->lock);
+ if (replicas.e.nr_devs) {
+ spin_unlock(&j->lock);
+ ret = bch2_mark_replicas(c, &replicas.e);
+ spin_lock(&j->lock);
+ }
}
spin_unlock(&j->lock);
-
+err:
ret = bch2_replicas_gc_end(c, ret);
mutex_unlock(&c->replicas_gc_lock);
projects / bcachefs-tools-debian / blobdiff