[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/37844/
Subject: LU-13004 lnet: remove msg_iov from lnet_msg.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 585e6df77ebf2553760c42b3c7344a6bb0ee7f5e

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37843/
Subject: LU-13004 lnet: discard kvec option from lnet_libmd.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 4775d52439f4f8df42056626535462ecb6cce009

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37842/
Subject: LU-13004 lnet: always put a page list into struct lnet_libmd
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 857f11169fc8d7575b6b92e5dbb57b4c359d9dcc

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37841/
Subject: LU-13004 lnet: merge lnet_md_alloc into lnet_md_build.
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c0598f15dd502deadc6e84f362331d1ed77b6d14

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37840/
Subject: LU-13004 lnet: don't embed whole lnet_md in lnet_event
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 23f1c6e1f15ea4b457e40c91ee9d3768b7da253e

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/36974/
Subject: LU-13004 net: discard LNET_MD_IOVEC
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: bcdb4a285f33f83ca51ec0eb6945ef95a3164f7a

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/37852/
Subject: LU-13004 modules: replace lnet_kiov_t with struct bio_vec
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 7a74d382d5e8867785f662aede54a3e399168325

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new 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: 1
Commit: 049011a7d5bf8ef571ba623a1e26f62a0c24a450

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new patch: https://review.whamcloud.com/37844
Subject: LU-13004 lnet: remove msg_iov from lnet_msg.
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 1f53b14bb0a764ccba755bcfd1c37ea98cbf0500

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new 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: 1
Commit: 9159d0dfeddb0312dc797b961d2ba3a596c95b3d

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new 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: 1
Commit: d9b2ceb797895943e8fba7110d23e8cfa73f94f2