[LU-13457] tgt_grant_check() cli claims grant

• Type: Question/Request
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.10.8
• Environment: EL7.7 x86_64
• Assignee: WC Triage
• Reporter: Götz Waschk

Description

I've seen many error messages in the syslog from one of my Lustre instances. All servers use Lustre 2.10.8, all clients but one as well:

 

Apr 16 13:11:38 miscoss12 kernel: LustreError: 6833:0:(tgt_grant.c:738:tgt_grant_check()) fs23-OST0000: cli c0765277-fdd7-0895-59f6-c9044241b458 claims 122880 GRANT, real grant 0
Apr 16 13:11:38 miscoss12 kernel: LustreError: 6833:0:(tgt_grant.c:738:tgt_grant_check()) Skipped 4018 previous similar messages
Apr 16 13:15:24 miscoss14 kernel: [14739904.808254] LustreError: 6254:0:(tgt_grant.c:738:tgt_grant_check()) fs23-OST0002: cli 81647aeb-cc5a-548d-1370-7b9c0838b889 claims 503808 GRANT, real grant 0
Apr 16 13:15:24 miscoss14 kernel: [14739904.814227] LustreError: 6254:0:(tgt_grant.c:738:tgt_grant_check()) Skipped 496 previous similar messages
Apr 16 13:15:24 miscoss14 kernel: LustreError: 6254:0:(tgt_grant.c:738:tgt_grant_check()) fs23-OST0002: cli 81647aeb-cc5a-548d-1370-7b9c0838b889 claims 503808 GRANT, real grant 0
Apr 16 13:15:24 miscoss14 kernel: LustreError: 6254:0:(tgt_grant.c:738:tgt_grant_check()) Skipped 496 previous similar messages
Apr 16 13:18:38 miscoss19 kernel: [14912825.820713] LustreError: 94649:0:(tgt_grant.c:738:tgt_grant_check()) fs23-OST0007: cli e4400067-3eba-6690-da1d-9ebe3cde3a81 claims 135168 GRANT, real grant 0
Apr 16 13:18:38 miscoss19 kernel: [14912825.827245] LustreError: 94649:0:(tgt_grant.c:738:tgt_grant_check()) Skipped 1706 previous similar messages
Apr 16 13:18:38 miscoss19 kernel: LustreError: 94649:0:(tgt_grant.c:738:tgt_grant_check()) fs23-OST0007: cli e4400067-3eba-6690-da1d-9ebe3cde3a81 claims 135168 GRANT, real grant 0
Apr 16 13:18:38 miscoss19 kernel: LustreError: 94649:0:(tgt_grant.c:738:tgt_grant_check()) Skipped 1706 previous similar messages

 

What does that mean, is it a performance issue?

Issue Links

• is related to: LU-9704 ofd_grant_check() claims GRANT, real grant 0
• is related to: LU-13766 tgt_grant_check() lsrza-OST000a: cli dfdf1aff-07d9-53b3-5632-c18a78027eb2 claims 1703936 GRANT, real grant 0