[LU-9396] kms_shift_cb ldlm debug is too expensive Created: 25/Apr/17 Updated: 25/Apr/17 Resolved: 25/Apr/17 |
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| Status: | Closed |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Major |
| Reporter: | Patrick Farrell (Inactive) | Assignee: | Patrick Farrell (Inactive) |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | None | ||
| Severity: | 3 |
| Rank (Obsolete): | 9223372036854775807 |
| Description |
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The LDLM_DEBUG debug statement in kms_shift_cb is too expensive, and under real workloads with +dlmtrace, it tends to lead to RCU stalls. Under certain loads, this debug can be called for most/all of the locks on a resource while the resource spin lock is held. This is just too expensive, and the debug doesn't add that much. Remove it. |
| Comments |
| Comment by Patrick Farrell (Inactive) [ 25/Apr/17 ] |
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Oops - This is already fixed in master. Nevermind... |