[LU-17471] Add symlink /proc/fs/lustre/osd-*/*/brw_stats to /sys/kernel/debug/lustre/osd-*/*/brw_stats

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Hongchao Zhang

Description

Add symlink at /proc/fs/lustre/osd-*/*/brw_stats to /sys/kernel/debug/lustre/osd-*/*/brw_stats to be compatible with the previous tools that are still using the old proc entry

Issue Links

• is related to: LU-11850 Relocating /proc/fs/lustre/ost to /sys/kernel/debug/lustre/ost prevents non-root access

Comments

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/56917/
Subject: LU-17471 osd-ldiskfs: brw_stats symlink module option
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: cee4e10e4908aa0f3f483d337bc3296680df3828

[Gerrit Updater]

"Andreas Dilger <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/56917
Subject: LU-17471 osd-ldiskfs: brw_stats symlink module option
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 07d29f14476087afdfa3ccccd2c45db34b8f7772

[Peter Jones]

Landed for 2.16

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/53829/
Subject: LU-17471 osd: add symlink for brw_stats
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 47ccacd58dafb3d9a257c37a06b57a8bd19ff1ce

[James A Simmons]

Looking at the brw_stats we have:

snapshot_time:            1706282708.388344346 secs.nsecs
start_time:               1706235995.333903347 secs.nsecs
elapsed_time:             46713.054440999 secs.nsecs

                          read      |     write
pages per bulk r/w     rpcs  % cum % |  rpcs        % cum %

                          read      |     write
discontiguous pages    rpcs  % cum % |  rpcs        % cum %

                          read      |     write
discontiguous blocks   rpcs  % cum % |  rpcs        % cum %

                          read      |     write
disk fragmented I/Os   ios   % cum % |  ios         % cum %

                          read      |     write
disk I/Os in flight    ios   % cum % |  ios         % cum %

                          read      |     write
I/O time (1/1000s)     ios   % cum % |  ios         % cum %

                          read      |     write
disk I/O size          ios   % cum % |  ios         % cum %

                          read      |     write
block maps msec        maps  % cum % |  maps        % cum %

How should this look for a proper YAML format?

[James A Simmons]

Adding a symlink into proc is a big no no. Lets complete the LU-11850 work instead. Its made good progress the last few days.

[Gerrit Updater]

"Hongchao Zhang <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/53829
Subject: LU-17471 osd: add symlink for brw_stats
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 828af49c895de3deea4c7e3f8c6d12ab89eb5a3b