[LU-10157] LNET_MAX_IOV hard coded to 256

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.12.0, Lustre 2.10.6, Lustre 2.14.0, Lustre 2.12.7
• Labels: patch
• Severity: 3
• Assignee: Alexey Lyashkov
• Reporter: Amir Shehata (Inactive)

Description

LNET_MAX_IOV is hard coded to 256 which works well for architectures with 4096 PAGE_SIZE. However on systems with page sizes bigger or smaller than 4K it will result in long MD count calculations, causing write errors.

Issue Links

• duplicates: LU-10775 (sec.c:2363:sptlrpc_svc_unwrap_bulk()) @@@ truncated bulk GET 1048576(2097152)
• is related to: LU-13181 kiblnd_fmr_pool_map error on the AARCH64 with 64k pages
• is related to: LU-10073 lnet-selftest test_smoke: lst Error found
• is related to: LU-6387 Add Power8 support to Lustre
• is related to: LU-10300 Can the Lustre 2.10.x clients support 64K kernel page?
• is related to: LU-10129 map-on-demand set to 32 doesn't work on OPA
• is related to: LU-7650 ko2iblnd map_on_demand can't negotitate when page sizes are different between nodes.

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/41277/
Subject: LU-10157 lnet: restore an maximal fragments count
Project: fs/lustre-release
Branch: b2_12
Current Patch Set:
Commit: e39ba78737b63128cfc7df9d49c8dd49a30ce590

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/41276/
Subject: LU-10157 ptlrpc: fill md correctly.
Project: fs/lustre-release
Branch: b2_12
Current Patch Set:
Commit: 8ef7c5c45567fc9cdedfe4242a6c5b73193ab9fe

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/41275/
Subject: LU-10157 ptlrpc: separate number MD and refrences for bulk
Project: fs/lustre-release
Branch: b2_12
Current Patch Set:
Commit: 39cc8bd8d3747583e5029e4cd9520115ab0c6ff1

[Gerrit Updater]

Serguei Smirnov ([e-mail]) uploaded a new patch: https://review.whamcloud.com/41277
Subject: LU-10157 lnet: restore an maximal fragments count
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: 385819a69da21e8caf1b4b5ef80beb1b87f2c560

[Gerrit Updater]

Serguei Smirnov ([e-mail]) uploaded a new patch: https://review.whamcloud.com/41276
Subject: LU-10157 ptlrpc: fill md correctly.
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: 1b3f8e4ad1adeb52505aaa34be2a9246997658bf

[Gerrit Updater]

Serguei Smirnov ([e-mail]) uploaded a new patch: https://review.whamcloud.com/41275
Subject: LU-10157 ptlrpc: separate number MD and refrences for bulk
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: 0d8b5acaf0cf3e741652e93e9894c43a5bf21f2e