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bcachefs: Go RW before bch2_check_lrus()

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btree updates before going RW are expensive if they're in random order,
since they use the list of keys for journal replay to insert, which is
just a gap buffer.

This patch improves the bucket invalidate path so that if
bch2_check_lrus() hasn't finished it only prints warnings instead of
doing an emergency shutdown, which means we can now set BCH_FS_MAY_GO_RW
before bch2_check_lrus().

Also, the filesystem state bits are reorganized a bit.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-04-21 13:13:57 -04:00 committed by Kent Overstreet
parent 104c69745f
commit 1cab5a82cc
4 changed files with 90 additions and 55 deletions
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36
fs/bcachefs/alloc_background.c
View file

@ -382,7 +382,8 @@ int bch2_alloc_v4_invalid(const struct bch_fs *c, struct bkey_s_c k,
return -EINVAL;
}
if (!a.v->io_time[READ]) {
if (!a.v->io_time[READ] &&
test_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags)) {
pr_buf(err, "cached bucket with read_time == 0");
return -EINVAL;
}
@ -588,7 +589,6 @@ int bch2_trans_mark_alloc(struct btree_trans *trans,
!new_a->io_time[READ])
new_a->io_time[READ] = max_t(u64, 1, atomic64_read(&c->io_clock[READ].now));
old_lru = alloc_lru_idx(old_a);
new_lru = alloc_lru_idx(*new_a);
@ -1088,6 +1088,7 @@ static int invalidate_one_bucket(struct btree_trans *trans, struct bch_dev *ca)
bch2_trans_iter_init(trans, &lru_iter, BTREE_ID_lru,
POS(ca->dev_idx, 0), 0);
next_lru:
k = bch2_btree_iter_peek(&lru_iter);
ret = bkey_err(k);
if (ret)
@ -1096,9 +1097,20 @@ static int invalidate_one_bucket(struct btree_trans *trans, struct bch_dev *ca)
if (!k.k || k.k->p.inode != ca->dev_idx)
goto out;
if (bch2_trans_inconsistent_on(k.k->type != KEY_TYPE_lru, trans,
"non lru key in lru btree"))
goto out;
if (k.k->type != KEY_TYPE_lru) {
pr_buf(&buf, "non lru key in lru btree:\n ");
bch2_bkey_val_to_text(&buf, c, k);
if (!test_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags)) {
bch_err(c, "%s", buf.buf);
bch2_btree_iter_advance(&lru_iter);
goto next_lru;
} else {
bch2_trans_inconsistent(trans, "%s", buf.buf);
ret = -EINVAL;
goto out;
}
}
idx = k.k->p.offset;
bucket = le64_to_cpu(bkey_s_c_to_lru(k).v->idx);
@ -1111,13 +1123,19 @@ static int invalidate_one_bucket(struct btree_trans *trans, struct bch_dev *ca)
if (idx != alloc_lru_idx(a->v)) {
pr_buf(&buf, "alloc key does not point back to lru entry when invalidating bucket:\n ");
bch2_bkey_val_to_text(&buf, c, bkey_i_to_s_c(&a->k_i));
pr_buf(&buf, "\n ");
bch2_bkey_val_to_text(&buf, c, k);
bch2_trans_inconsistent(trans, "%s", buf.buf);
ret = -EINVAL;
goto out;
if (!test_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags)) {
bch_err(c, "%s", buf.buf);
bch2_btree_iter_advance(&lru_iter);
goto next_lru;
} else {
bch2_trans_inconsistent(trans, "%s", buf.buf);
ret = -EINVAL;
goto out;
}
}
SET_BCH_ALLOC_V4_NEED_INC_GEN(&a->v, false);

19
fs/bcachefs/bcachefs.h
View file

@ -494,11 +494,6 @@ struct bch_dev {
enum {
/* startup: */
BCH_FS_CLEAN_SHUTDOWN,
BCH_FS_INITIAL_GC_DONE,
BCH_FS_INITIAL_GC_UNFIXED,
BCH_FS_TOPOLOGY_REPAIR_DONE,
BCH_FS_FSCK_DONE,
BCH_FS_STARTED,
BCH_FS_MAY_GO_RW,
BCH_FS_RW,
@ -508,16 +503,22 @@ enum {
BCH_FS_STOPPING,
BCH_FS_EMERGENCY_RO,
BCH_FS_WRITE_DISABLE_COMPLETE,
BCH_FS_CLEAN_SHUTDOWN,
/* fsck passes: */
BCH_FS_TOPOLOGY_REPAIR_DONE,
BCH_FS_INITIAL_GC_DONE, /* kill when we enumerate fsck passes */
BCH_FS_CHECK_LRUS_DONE,
BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE,
BCH_FS_FSCK_DONE,
BCH_FS_INITIAL_GC_UNFIXED, /* kill when we enumerate fsck errors */
BCH_FS_NEED_ANOTHER_GC,
/* errors: */
BCH_FS_ERROR,
BCH_FS_TOPOLOGY_ERROR,
BCH_FS_ERRORS_FIXED,
BCH_FS_ERRORS_NOT_FIXED,
/* misc: */
BCH_FS_NEED_ANOTHER_GC,
BCH_FS_DELETED_NODES,
};
struct btree_debug {

4
fs/bcachefs/lru.c
View file

@ -204,7 +204,9 @@ int bch2_check_lrus(struct bch_fs *c, bool initial)
for_each_btree_key(&trans, iter, BTREE_ID_lru, POS_MIN,
BTREE_ITER_PREFETCH, k, ret) {
ret = __bch2_trans_do(&trans, NULL, NULL, 0,
ret = __bch2_trans_do(&trans, NULL, NULL,
BTREE_INSERT_NOFAIL|
BTREE_INSERT_LAZY_RW,
bch2_check_lru_key(&trans, &iter, initial));
if (ret)
break;

86
fs/bcachefs/recovery.c
View file

@ -994,7 +994,6 @@ static int bch2_fs_initialize_subvolumes(struct bch_fs *c)
if (ret)
return ret;
bkey_subvolume_init(&root_volume.k_i);
root_volume.k.p.offset = BCACHEFS_ROOT_SUBVOL;
root_volume.v.flags = 0;
@ -1096,6 +1095,12 @@ int bch2_fs_recovery(struct bch_fs *c)
}
}
if (c->opts.fsck && c->opts.norecovery) {
bch_err(c, "cannot select both norecovery and fsck");
ret = -EINVAL;
goto err;
}
ret = bch2_blacklist_table_initialize(c);
if (ret) {
bch_err(c, "error initializing blacklist table");
@ -1189,6 +1194,13 @@ int bch2_fs_recovery(struct bch_fs *c)
if (ret)
goto err;
/*
* Skip past versions that might have possibly been used (as nonces),
* but hadn't had their pointers written:
*/
if (c->sb.encryption_type && !c->sb.clean)
atomic64_add(1 << 16, &c->key_version);
ret = read_btree_roots(c);
if (ret)
goto err;
@ -1211,12 +1223,7 @@ int bch2_fs_recovery(struct bch_fs *c)
goto err;
bch_verbose(c, "stripes_read done");
/*
* If we're not running fsck, this ensures bch2_fsck_err() calls are
* instead interpreted as bch2_inconsistent_err() calls:
*/
if (!c->opts.fsck)
set_bit(BCH_FS_FSCK_DONE, &c->flags);
bch2_stripes_heap_start(c);
if (c->opts.fsck) {
bool metadata_only = c->opts.norecovery;
@ -1228,6 +1235,8 @@ int bch2_fs_recovery(struct bch_fs *c)
goto err;
bch_verbose(c, "done checking allocations");
set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
bch_info(c, "checking need_discard and freespace btrees");
err = "error checking need_discard and freespace btrees";
ret = bch2_check_alloc_info(c);
@ -1235,55 +1244,60 @@ int bch2_fs_recovery(struct bch_fs *c)
goto err;
bch_verbose(c, "done checking need_discard and freespace btrees");
set_bit(BCH_FS_MAY_GO_RW, &c->flags);
bch_verbose(c, "starting journal replay, %zu keys", c->journal_keys.nr);
err = "journal replay failed";
ret = bch2_journal_replay(c);
if (ret)
goto err;
if (c->opts.verbose || !c->sb.clean)
bch_info(c, "journal replay done");
bch_info(c, "checking lrus");
err = "error checking lrus";
ret = bch2_check_lrus(c, true);
if (ret)
goto err;
bch_verbose(c, "done checking lrus");
}
bch2_stripes_heap_start(c);
set_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags);
set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
set_bit(BCH_FS_MAY_GO_RW, &c->flags);
/*
* Skip past versions that might have possibly been used (as nonces),
* but hadn't had their pointers written:
*/
if (c->sb.encryption_type && !c->sb.clean)
atomic64_add(1 << 16, &c->key_version);
if (c->opts.norecovery)
goto out;
bch_verbose(c, "starting journal replay, %zu keys", c->journal_keys.nr);
err = "journal replay failed";
ret = bch2_journal_replay(c);
if (ret)
goto err;
if (c->opts.verbose || !c->sb.clean)
bch_info(c, "journal replay done");
err = "error initializing freespace";
ret = bch2_fs_freespace_init(c);
if (ret)
goto err;
if (c->opts.fsck) {
bch_info(c, "checking alloc to lru refs");
err = "error checking alloc to lru refs";
ret = bch2_check_alloc_to_lru_refs(c);
if (ret)
goto err;
set_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags);
ret = bch2_check_lrus(c, true);
if (ret)
goto err;
bch_verbose(c, "done checking alloc to lru refs");
} else {
set_bit(BCH_FS_MAY_GO_RW, &c->flags);
set_bit(BCH_FS_INITIAL_GC_DONE, &c->flags);
set_bit(BCH_FS_CHECK_LRUS_DONE, &c->flags);
set_bit(BCH_FS_CHECK_ALLOC_TO_LRU_REFS_DONE, &c->flags);
set_bit(BCH_FS_FSCK_DONE, &c->flags);
if (c->opts.norecovery)
goto out;
bch_verbose(c, "starting journal replay, %zu keys", c->journal_keys.nr);
err = "journal replay failed";
ret = bch2_journal_replay(c);
if (ret)
goto err;
if (c->opts.verbose || !c->sb.clean)
bch_info(c, "journal replay done");
}
err = "error initializing freespace";
ret = bch2_fs_freespace_init(c);
if (ret)
goto err;
if (c->sb.version < bcachefs_metadata_version_snapshot_2) {
bch2_fs_lazy_rw(c);