[LU-13004] Use a single style of IO buf descriptor - iovec

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Assignee: Neil Brown
• Reporter: Neil Brown

Description

Lustre and lnet support two parallel types of IO descriptors:

• KVEC - a list of virtual-address plus SIZE
• IOVEC - a list of PAGE + OFFSET + LEN

This results in unnecessary duplication. IOVEC is suitable for all use-cases.

This involves removing BULK_BUF_KVEC usage, then  LNET_MD_IOVEC, then ksock_tx.iov, then tx_iov - and probably other clean up.

 

Issue Links

• is related to: LU-14390 A change in LU-13004 wrongly switched to round_up() instead of DIV_ROUND_UP().
• is related to: LU-12678 LNet simplification work from linux client

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37853/
Subject: LU-13004 lnet: always pass struct lnet_md by reference.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: fb3ed0fe68e324f8d6e002a32486de7f5d38f2e3

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37847/
Subject: LU-13004 gnilnd: remove support for GNILND_BUF_VIRT_*
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: d50617709841a37afd9db00ea6c4ace94828a3c2

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37846/
Subject: LU-13004 gnilnd: discard struct kvec arg.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c87f41dd20f9940625b4cf8ee423c1d6ccac4750

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/38491/
Subject: LU-13004 lnet: Correct signature in gnilnd.h
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 21c11516b1a3511b0aaa34d8faaaff63c4117993

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37851/
Subject: LU-13004 socklnd: discard tx_iov.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 89637985b9897002929ac994a7366d92d20daf96

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37850/
Subject: LU-13004 lnet: simplify ksock_tx.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 28ffde29603b12627e87e9becd3ec2a5c377124d

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37849/
Subject: LU-13004 lnet: remove lnet_copy_flat2iov and ..iov2flat
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 12af05194ad71c5278a5943035a3da8200fac969

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37848/
Subject: LU-13004 lnet: remove lnet_extract_iov()
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 571943f9cd090f5d2577048d176f320430beada5

[Gerrit Updater]

Shaun Tancheff ([e-mail]) uploaded a new patch: https://review.whamcloud.com/38491
Subject: LU-13004 lnet: Correct signature in gnilnd.h
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: c233ec5aa4497eceb68de85328a9baa80e03509e

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37845/
Subject: LU-13004 lnet: remove the 'struct kvec' arg from lnd_send
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: e35b7751f49fb7044955e3fa65de5e1a6d638ca0