[LU-18912] migrate struct import bit fields to bitmap

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.17.0
• Environment: The ptlrpc layer.
• Severity: 3
• Assignee: James A Simmons
• Reporter: James A Simmons

Description

In many places in the ptlrpc layer we are taking a spin lock to read a single bit. We can remove the need for these spin_locks by using bitmap with the various atomic bitops the kernel provides. This avoids potential might_sleep issues since often the ptlrpc code is run in an atomic context.

Comments

[Gerrit Updater]

"James Simmons <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/58743
Subject: LU-18912 ptlrpc: change struct import bit files to bitmap API
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 7cda58b072b55137d1caef23b7e43e420f1e27d4