[LU-12137] update client to use iterate_shared

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.14.0
• Assignee: James A Simmons
• Reporter: Andreas Dilger

Description

Since kernel commit v4.6-rc3-29-g6192269 there is a new ->iterate_shared() file operation for reading directories with a shared lock on the client. We should change over the llite client to use the ->iterate_shared() method to improve directory access concurrency on the client.

There is already a HAVE_ITERATE_SHARED configure check that can be used to detect support for this functionality.

Issue Links

• is related to: LU-11832 ARM servers crashing on MDS startup
• is related to: LU-12598 osd_ios_lf_fill() returns 0 on some error paths.
• is related to: LU-11310 support for SLES 15
• is related to: LU-11044 ext4_dir_operations uses iterate_shared() in Linux 4.7
• is related to: LU-10997 Ubuntu 18 support
• is related to: LU-11200 Centos 8 arm64 server support

Comments

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/34556/
Subject: LU-12137 llite: use ->iterate_shared() for readdir
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 6e26d2d715ee65079682f7823f986f61f80eb07c

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35594/
Subject: LU-12137 osd-ldiskfs: create locked and unlocked versions of osd lookup code
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 7c0547a7dd732a9d127e427452a95e689a2c38de

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35582/
Subject: LU-12137 osd-ldiskfs: trace the obd device used for osd lookup
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: d15b0bd6949d18e5abf29033af36186269b48c01

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35803/
Subject: LU-12137 osd-ldiskfs: refactor osd_ios_ROOT_scan
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c769ba3025c59f110c38c44552a05142705c94c3

[Gerrit Updater]

James Simmons ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35803
Subject: LU-12137 osd-ldiskfs: refactor osd_ios_ROOT_scan
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 3cf2e4c7016978e2cfa0c001db81d65d0b286a15

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35581/
Subject: LU-12137 osd-ldiskfs: shared common code for osd lookup
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 49bced40ab3628590b720bcf74dbe38f8abada38

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35644/
Subject: LU-12137 osd-ldiskfs: implement proper error handling in osd_ios_OBJECTS_scan
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 752dec2f36cef0e4893f9c68d7cc2b9505488471

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/35580/
Subject: LU-12137 osd-ldiskfs: have scrub code handle NULL dentry inode
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c2134f1e55150c6f7add284d8bf3c32a445ab235

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35645
Subject: LU-12137 osd-ldiskfs: refactor osd_ios_ROOT_scan
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: bd38727e69eee50b111ff083620676b8256924b7

[Gerrit Updater]

Neil Brown ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35644
Subject: LU-12137 osd-ldiskfs: have scrub code handle NULL dentry inode
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 21467b9dd7931cbca03f508874e52ecccd205ea6

[Gerrit Updater]

James Simmons ([e-mail]) uploaded a new patch: https://review.whamcloud.com/35594
Subject: LU-12137 osd-ldiskfs: create locked and unlocked versions of osd lookup code
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 14bd0359ebb8c9498ba49b1902b90d4e00b93162