[LU-9184] early patches for Data-on-MDT support

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0, Lustre 2.11.0
• Assignee: Mikhail Pershin
• Reporter: Mikhail Pershin

Description

Collection of patches to land prior Data-on-MDT feature. So far there are:

• selective IBITS lock trying
• unified grants code
• constants to reserve for Data-on-MDT

Issue Links

• is related to: LU-10175 DoM:Full support for the LDLM lock convert

Comments

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/28022
Subject: LU-9184 ldlm: selective IBITS lock trying
Project: fs/lustre-release
Branch: dom
Current Patch Set: 1
Commit: ad57e89900ecc0f08247e6b0541348f7e263862e

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/28023
Subject: LU-9184 mdc: move layout data to the lr_lvb_data
Project: fs/lustre-release
Branch: dom
Current Patch Set: 1
Commit: e62eb255fe69696ecbf1ebc651df79aadb1ccbe1

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/27806
Subject: LU-9184 ldlm: selective IBITS lock trying
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: cc4b62cd1933f5ccf4b2d90148b0a6f11eba1c32

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/27807
Subject: LU-9184 mdc: move layout data to the lr_lvb_data
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 3c16af7f7b3f569af52199e0136492ed6eb109b7

[Mikhail Pershin]

The latest patch is to make component layout more flexible in terms of handling different component types, not just RAID0. It is also would be good to land early.

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/26837
Subject: LU-9184 lov: component layout entry can be not just RAID0
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 45bd514d0239ffa9600f14cf92a18b46c86ccb66

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/25820/
Subject: LU-9184 grants: move grant code to the target
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: e9389613eb29297f7b5a6b6cd896bafc7a5551f8

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/26467
Subject: LU-9184 ldlm: add extended stats for LDLM
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 9d59c334f786cb09531c4cb97b6cb3e37702030f

[Mikhail Pershin]

The unified grant patch moves grants code (and statfs) from OFD to the target, so it can be used by any target now. This is needed by Data-on-MDT but is useful also to control space consumption on MDT for things like HSM, lfsck and others.

[Gerrit Updater]

Mike Pershin ([e-mail]) uploaded a new patch: https://review.whamcloud.com/25820
Subject: LU-9184 grants: move grant code to the target
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8caf478c5969e06dc8bfccb7ba93c3a1c047a3f6

[Mikhail Pershin]

Selective IBITS lock try patch : https://review.whamcloud.com/#/c/25262/

Current lock try scheme mixes mandatory bits with bits to try and enqueu them along with LDLM_FL_BLOCK_NOWAIT flag to avoid blocking ASTs. If any bit conflicts them lock is enqueued just with mandatory bits as usual. Therefore the more bits we will try the less successful we will be.
The patch allows to add optional bits to IBITS lock separately from mandatory bits during lock enqueue and all non-conflicting bits will be granted. This becomes quite useful with upcoming features like Data-on-MDT, FLR, etc.