Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1634104

[PATCH v7 0/2] tcmu: Dynamic growing data area support

Show all headers | View raw

From: Xiubo Li <lixiubo@cmss.chinamobile.com>

Changed for V7:
- #1 fix two issues.
- #2 fix kbuild warning and some issues.

Changed for V6:
- Remove the tcmu_vma_close(). Since the unmap thread will do the same for it 
- The unmap thread will skip the busy devices.
- Using and testing the V5 version 3 weeks and the V6 for about 1 week, all in a higher IOPS environment:
  * using fio and dd commands
  * using about 4 targets based user:rbd/user:file backend
  * set the global pool size to 512 * 1024 blocks * block_size, for 4K page size, the size is 2G.
  * each target here needs more than 1100 blocks.
  * fio: -iodepth 16 -thread -rw=[read write] -bs=[1M] -size=20G -numjobs=10 -runtime=1000  ...
  * restart the tcmu-runner at any time.

Changed for V5:
- Rebase to the newest target-pending repository.
- Add as many comments as possbile to make the patch more readable.
- Move tcmu_handle_completions() in timeout handler to unmap thread
  and then replace the spin lock with mutex lock(because the unmap_*
  or zap_* may goto sleep) to simplify the patch and the code.
- Thanks very much for Mike's tips and suggestions.
- Tested this for more than 3 days by:
  * using fio and dd commands
  * using about 1~5 targets
  * set the global pool size to [512 1024 2048 512 * 1024] blocks * block_size
  * each target here needs more than 450 blocks when running in my environments.
  * fio: -iodepth [1 2 4 8 16] -thread -rw=[read write] -bs=[1K 2K 3K 5K 7K 16K 64K 1M] -size=20G -numjobs=10 -runtime=1000  ...
  * in the tcmu-runner, try to touch blocks out of tcmu_cmds' iov[] manually
  * restart the tcmu-runner at any time.
  * in my environment for the low IOPS case: the read throughput goes from about 5200KB/s to 6700KB/s; the write throughput goes from about 3000KB/s to 3700KB/s.

Xiubo Li (2):
  tcmu: Add dynamic growing data area feature support
  tcmu: Add global data block pool support

 drivers/target/target_core_user.c | 602 ++++++++++++++++++++++++++++++--------
 1 file changed, 473 insertions(+), 129 deletions(-)

-- 
1.8.3.1

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH v7 0/2] tcmu: Dynamic growing data area support lixiubo@cmss.chinamobile.com - 2017-05-02 05:40 +0200
  Re: [PATCH v7 0/2] tcmu: Dynamic growing data area support "Nicholas A. Bellinger" <nab@linux-iscsi.org> - 2017-05-02 08:00 +0200

csiph-web