[LU-19514] When kallsyms_lookup_name() is unavailable fallback to alternatives

• Type: Bug
• Resolution: Unresolved
• Priority: Medium
• Severity: 3
• Assignee: Shaun Tancheff
• Reporter: Shaun Tancheff

Description

Breaking Lustre because of missing kallsyms_lookup_name() isn't really workable.

There needs to be suitable alternatives for:
alloc_workqueue_attrs() / alloc_workqueue_attrs() ... nice but not critical

vfree_atomic() – not needed from v4.10? vfree will call vfree_atomic() when in_interrupt() is true.

Unfortunately we have no way to detect this via configure (aside from guessing based on kernel version).

So just copy the kernel implementation into Luster instead?

Issue Links

• is related to: LU-12564 ptlrpcd daemon sleeps while holding imp_lock spinlock
• is related to: LU-18687 Separate userspace/compat code from kernel code