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bdev: Use unified split logic for write_zeroes command fallback

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Write_zeroes command fallback had used its own split logic but multiple
writes had been serialized.

Use the unified split logic also for the write_zeroes command fallback.

This not only improves the performance but also simplifies the code.

Signed-off-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Change-Id: I955870947ae036482871453b4870f06f6f7f947b
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/17902
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Community-CI: Mellanox Build Bot
This commit is contained in:
Shuhei Matsumoto 2023-05-02 22:03:46 +09:00 committed by David Ko
parent 9454d16810
commit 509652cc4b
1 changed files with 20 additions and 40 deletions
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60
lib/bdev/bdev.c
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@ -382,7 +382,7 @@ static inline void bdev_io_complete(void *ctx);
static inline void bdev_io_complete_unsubmitted(struct spdk_bdev_io *bdev_io);
static void bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
static void bdev_write_zero_buffer_next(void *_bdev_io);
static int bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io);
static void bdev_enable_qos_msg(struct spdk_bdev_channel_iter *i, struct spdk_bdev *bdev,
struct spdk_io_channel *ch, void *_ctx);
@ -5989,18 +5989,21 @@ spdk_bdev_write_zeroes_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channe
bdev_io->u.bdev.memory_domain_ctx = NULL;
bdev_io->u.bdev.accel_sequence = NULL;
if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)) {
/* If the write_zeroes size is large and should be split, use the generic split
* logic regardless of whether SPDK_BDEV_IO_TYPE_WRITE_ZEREOS is supported or not.
*
* Then, send the write_zeroes request if SPDK_BDEV_IO_TYPE_WRITE_ZEROES is supported
* or emulate it using regular write request otherwise.
*/
if (bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES) ||
bdev_io->internal.split) {
bdev_io_submit(bdev_io);
return 0;
}
assert(bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE));
assert(_bdev_get_block_size_with_md(bdev) <= ZERO_BUFFER_SIZE);
bdev_io->u.bdev.split_remaining_num_blocks = num_blocks;
bdev_io->u.bdev.split_current_offset_blocks = offset_blocks;
bdev_write_zero_buffer_next(bdev_io);
return 0;
return bdev_write_zero_buffer(bdev_io);
}
int
@ -8583,36 +8586,24 @@ spdk_bdev_module_list_find(const char *name)
return bdev_module;
}
static void
bdev_write_zero_buffer_next(void *_bdev_io)
static int
bdev_write_zero_buffer(struct spdk_bdev_io *bdev_io)
{
struct spdk_bdev_io *bdev_io = _bdev_io;
uint64_t num_blocks;
void *md_buf = NULL;
int rc;
num_blocks = spdk_min(bdev_io->u.bdev.split_remaining_num_blocks,
bdev_io->bdev->max_write_zeroes);
num_blocks = bdev_io->u.bdev.num_blocks;
if (spdk_bdev_is_md_separate(bdev_io->bdev)) {
md_buf = (char *)g_bdev_mgr.zero_buffer +
spdk_bdev_get_block_size(bdev_io->bdev) * num_blocks;
}
rc = bdev_write_blocks_with_md(bdev_io->internal.desc,
spdk_io_channel_from_ctx(bdev_io->internal.ch),
g_bdev_mgr.zero_buffer, md_buf,
bdev_io->u.bdev.split_current_offset_blocks, num_blocks,
bdev_write_zero_buffer_done, bdev_io);
if (rc == 0) {
bdev_io->u.bdev.split_remaining_num_blocks -= num_blocks;
bdev_io->u.bdev.split_current_offset_blocks += num_blocks;
} else if (rc == -ENOMEM) {
bdev_queue_io_wait_with_cb(bdev_io, bdev_write_zero_buffer_next);
} else {
bdev_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
bdev_io->internal.cb(bdev_io, false, bdev_io->internal.caller_ctx);
}
return bdev_write_blocks_with_md(bdev_io->internal.desc,
spdk_io_channel_from_ctx(bdev_io->internal.ch),
g_bdev_mgr.zero_buffer, md_buf,
bdev_io->u.bdev.offset_blocks, num_blocks,
bdev_write_zero_buffer_done, bdev_io);
}
static void
@ -8622,19 +8613,8 @@ bdev_write_zero_buffer_done(struct spdk_bdev_io *bdev_io, bool success, void *cb
spdk_bdev_free_io(bdev_io);
if (!success) {
parent_io->internal.status = SPDK_BDEV_IO_STATUS_FAILED;
parent_io->internal.cb(parent_io, false, parent_io->internal.caller_ctx);
return;
}
if (parent_io->u.bdev.split_remaining_num_blocks == 0) {
parent_io->internal.status = SPDK_BDEV_IO_STATUS_SUCCESS;
parent_io->internal.cb(parent_io, true, parent_io->internal.caller_ctx);
return;
}
bdev_write_zero_buffer_next(parent_io);
parent_io->internal.status = success ? SPDK_BDEV_IO_STATUS_SUCCESS : SPDK_BDEV_IO_STATUS_FAILED;
parent_io->internal.cb(parent_io, success, parent_io->internal.caller_ctx);
}
static void