[LU-15003] use client enc_pool for fscrypt

• Type: Improvement
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.2
• Labels: performance
• Assignee: Sebastien Buisson
• Reporter: Andreas Dilger

Description

According to Sebastien's fscrypt presentation at LAD'20, the use of bounce buffers reduces fscrypt performance by up to 30%.

This can be replaced by using preallocated pages in enc_pool from Kerberos, so that pages do not need to be allocated/freed for every RPC.

Issue Links

• is related to: LU-12275 Client-side file data encryption

Comments

[Peter Jones]

Landed for 2.15.2 and 2.16

[Gerrit Updater]

"Sebastien Buisson <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/48411
Subject: LU-15003 sec: use enc pool for bounce pages
Project: fs/lustre-release
Branch: b2_15
Current Patch Set: 1
Commit: 59f7bf31f8ff1811f216099cc2e3895eb6c7726e

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/47149/
Subject: LU-15003 sec: use enc pool for bounce pages
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: f3fe144b8572e9e75bb55076e29057227476ebf5

[James A Simmons]

This looks like an excellent optimization to send upstream.

[Gerrit Updater]

"Sebastien Buisson <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47150
Subject: LU-15003 sec: test native fscrypt
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 257afdd284be35660d4d1b1373db8de6811dae0d

[Gerrit Updater]

"Sebastien Buisson <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47149
Subject: LU-15003 sec: use enc pool for bounce pages
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: dd3d3cb03ff2eb0d46ed5aca6c9b819708312266

[Sebastien Buisson]

I think the first step would be to re-run benchmarks with recent Lustre/distro/kernel/cpu in order to confirm the performance drop incurred by client encryption.