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Support using Linux page cache for reads

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This commit is contained in:
Vitaliy Filippov
2023-07-17 00:34:58 +03:00
parent e4ea8a9514
commit 98d5849190
7 changed files with 91 additions and 11 deletions
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src/blockstore_read.cpp
+3 -3
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@@ -29,7 +29,7 @@ int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_
PRIV(op)->pending_ops++;
my_uring_prep_readv(
sqe,
IS_JOURNAL(item_state) ? dsk.journal_fd : dsk.data_fd,
IS_JOURNAL(item_state) ? dsk.read_journal_fd : dsk.read_data_fd,
&data->iov, 1,
(IS_JOURNAL(item_state) ? dsk.journal_offset : dsk.data_offset) + offset
);
@@ -348,7 +348,7 @@ bool blockstore_impl_t::read_checksum_block(blockstore_op_t *op, int rv_pos, uin
.csum_buf = vi->csum_buf,
.dyn_data = vi->dyn_data,
};
int submit_fd = (vi->copy_flags & COPY_BUF_JOURNAL ? dsk.journal_fd : dsk.data_fd);
int submit_fd = (vi->copy_flags & COPY_BUF_JOURNAL ? dsk.read_journal_fd : dsk.read_data_fd);
uint64_t submit_offset = (vi->copy_flags & COPY_BUF_JOURNAL ? journal.offset : dsk.data_offset);
uint32_t d_pos = 0;
for (int n_pos = 0; n_pos < n_iov; n_pos += IOV_MAX)
@@ -702,7 +702,7 @@ uint8_t* blockstore_impl_t::read_clean_meta_block(blockstore_op_t *op, uint64_t
BS_SUBMIT_GET_SQE(sqe, data);
data->iov = (struct iovec){ buf, dsk.meta_block_size };
PRIV(op)->pending_ops++;
my_uring_prep_readv(sqe, dsk.meta_fd, &data->iov, 1, dsk.meta_offset + dsk.meta_block_size + sector);
my_uring_prep_readv(sqe, dsk.read_meta_fd, &data->iov, 1, dsk.meta_offset + dsk.meta_block_size + sector);
data->callback = [this, op](ring_data_t *data) { handle_read_event(data, op); };
// return pointer to checksums + bitmap
return buf + pos + sizeof(clean_disk_entry);