apfs/linux-apfs
0
0
Fork 0
mirror of https://github.com/linux-apfs/linux-apfs.git synced 2026-05-01 15:00:59 -07:00
Code Issues Packages Projects Releases Wiki Activity

nbd: add multi-connection support

Browse Source 
NBD can become contended on its single connection.  We have to serialize all
writes and we can only process one read response at a time.  Fix this by
allowing userspace to provide multiple connections to a single nbd device.  This
coupled with block-mq drastically increases performance in multi-process cases.
Thanks,

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Josef Bacik
2016-11-22 14:04:40 -05:00
committed by Jens Axboe
parent e00f4f4d0f
commit 9561a7ade0
2 changed files with 244 additions and 149 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/block/nbd.c
+236 -142
View File
File diff suppressed because it is too large Load Diff
include/uapi/linux/nbd.h
+1
View File
@@ -43,6 +43,7 @@ enum {
#define NBD_FLAG_SEND_FLUSH (1 << 2) /* can flush writeback cache */
/* there is a gap here to match userspace */
#define NBD_FLAG_SEND_TRIM (1 << 5) /* send trim/discard */
#define NBD_FLAG_CAN_MULTI_CONN (1 << 7) /* Server supports multiple connections per export. */
/* userspace doesn't need the nbd_device structure */