[LU-6285] Assert fails in staging client module crashes kernel if CPUMASK_OFFSTACK set

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0, Lustre 2.9.0
• Affects Version/s: Lustre 2.4.0

Epic/Theme

staging

• Severity: 3
• Assignee: Oleg Drokin
• Reporter: Tyson Whitehead (Inactive)

Description

Enabling CONFIG_CPUMASK_OFFSTACK in stock kernel 3.18.0 causes the staging ptlrpc module to emit the message

LustreError: 1203:0:(service.c:2796:ptlrpc_hr_init()) ASSERTION( hrp->hrp_nthrs > 0 ) failed:

followed by a backtrace and kernel lockup upon loading. I'll attach my dmesg dump and the .config file I used. I picked version 2.4.0 above as there doesn't seem to be anyway to indicate the staging client version.

Issue Links

• is related to: LU-8492 ptlrpc: Correctly calculate hrp->hrp_nthrs
• is related to: LU-6215 Sync Lustre external tree with lustre linux kernel client
• is related to: LU-4011 problems with upstream lustre client code