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Save completed_lsn in the superblock

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This commit is contained in:
Vitaliy Filippov
2025-12-02 01:52:12 +03:00
parent 3eecf9048c
commit e709657de4
11 changed files with 65 additions and 22 deletions
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src/blockstore/blockstore_flush.cpp
+46 -2
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@@ -18,7 +18,6 @@ journal_flusher_t::journal_flusher_t(blockstore_impl_t *bs)
this->cur_flusher_count = bs->min_flusher_count;
this->target_flusher_count = bs->min_flusher_count;
active_flushers = 0;
advance_lsn_counter = 0;
co = new journal_flusher_co[max_flusher_count];
for (int i = 0; i < max_flusher_count; i++)
{
@@ -132,8 +131,12 @@ void journal_flusher_t::loop()
}
}
int prev_active = active_flushers;
for (int i = 0; (active_flushers > 0 || force_start > 0 || bs->heap->get_to_compact_count() > bs->flusher_start_threshold) && i < cur_flusher_count; i++)
for (int i = 0; (active_flushers > 0 || force_start > 0 ||
bs->heap->get_to_compact_count() > bs->flusher_start_threshold ||
i == 0 && bs->intent_write_counter >= bs->journal_trim_interval) && i < cur_flusher_count; i++)
{
co[i].loop();
}
if (prev_active && !active_flushers && force_start > 0)
bs->ringloop->wakeup();
}
@@ -170,11 +173,22 @@ bool journal_flusher_co::loop()
else if (wait_state == 14) goto resume_14;
else if (wait_state == 15) goto resume_15;
else if (wait_state == 16) goto resume_16;
else if (wait_state == 17) goto resume_17;
else if (wait_state == 18) goto resume_18;
resume_0:
wait_state = 0;
wait_count = 0;
cur_oid = {};
res = bs->heap->get_next_compact(cur_oid);
// Advance fsynced_lsn every <journal_trim_interval> intent writes
if ((bs->intent_write_counter >= bs->journal_trim_interval) && co_id == 0)
{
bs->intent_write_counter = 0;
resume_17:
resume_18:
if (!trim_lsn(17))
return false;
}
if (res == ENOENT && flusher->force_start > 0 && co_id == 0 &&
(!bs->dsk.disable_journal_fsync || !bs->dsk.disable_meta_fsync))
{
@@ -740,3 +754,33 @@ resume_2:
flusher->syncing_buffer--;
return true;
}
bool journal_flusher_co::trim_lsn(int wait_base)
{
if (wait_state == wait_base) goto resume_0;
else if (wait_state == wait_base+1) goto resume_1;
fsynced_lsn = bs->heap->get_fsynced_lsn();
if (((blockstore_meta_header_v3_t*)bs->meta_superblock)->completed_lsn == fsynced_lsn)
{
return true;
}
flusher->active_flushers++;
((blockstore_meta_header_v3_t*)bs->meta_superblock)->completed_lsn = fsynced_lsn;
((blockstore_meta_header_v3_t*)bs->meta_superblock)->set_crc32c();
await_sqe(0);
data->iov = (struct iovec){ bs->meta_superblock, (size_t)bs->dsk.meta_block_size };
data->callback = simple_callback_w;
io_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
// Update superblock with datasync
sqe->rw_flags = RWF_DSYNC;
wait_count++;
resume_1:
if (wait_count > 0)
{
wait_state = wait_base+1;
return false;
}
flusher->compact_counter++;
flusher->active_flushers--;
return true;
}