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Do not copy journal data additional time when flushing

rm-left-on-dead
Vitaliy Filippov 2022-11-12 12:08:49 +03:00
parent cc24e5796e
commit a276a1f737
1 changed files with 9 additions and 4 deletions
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13
src/blockstore_flush.cpp
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@ -615,7 +615,11 @@ resume_1:
}
for (it = v.begin(); it != v.end(); it++)
{
free(it->buf);
// Free it if it's not taken from the journal
if (it->buf && (!bs->journal.inmemory || it->buf < bs->journal.buffer || it->buf >= bs->journal.buffer + bs->journal.len))
{
free(it->buf);
}
}
v.clear();
// And sync metadata (in batches - not per each operation!)
@ -760,16 +764,17 @@ bool journal_flusher_co::scan_dirty(int wait_base)
{
submit_offset = dirty_it->second.location + offset - dirty_it->second.offset;
submit_len = it == v.end() || it->offset >= end_offset ? end_offset-offset : it->offset-offset;
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len, .buf = memalign_or_die(MEM_ALIGNMENT, submit_len) });
it = v.insert(it, (copy_buffer_t){ .offset = offset, .len = submit_len });
copy_count++;
if (bs->journal.inmemory)
{
// Take it from memory
memcpy(it->buf, (uint8_t*)bs->journal.buffer + submit_offset, submit_len);
// Take it from memory, don't copy it
it->buf = (uint8_t*)bs->journal.buffer + submit_offset;
}
else
{
// Read it from disk
it->buf = memalign_or_die(MEM_ALIGNMENT, submit_len);
await_sqe(0);
data->iov = (struct iovec){ it->buf, (size_t)submit_len };
data->callback = simple_callback_r;