[LU-7132] optimizations for the BRW path Created: 10/Sep/15 Updated: 25/Apr/16 Resolved: 25/Sep/15 |
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| Status: | Resolved |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | Lustre 2.8.0 |
| Fix Version/s: | Lustre 2.8.0 |
| Type: | Improvement | Priority: | Minor |
| Reporter: | Andrew Perepechko | Assignee: | WC Triage |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | patch | ||
| Issue Links: |
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| Rank (Obsolete): | 9223372036854775807 | ||||||||
| Description |
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We have an optimization that replaces bmap calls with fiemap calls through the brw path. A patch will be uploaded shortly. The patch also includes a fix for a fiemap deadlock in pre 3.8 kernels. This deadlock can happen without this fiemap optimization as well - through FIEMAP get_info RPC. |
| Comments |
| Comment by Gerrit Updater [ 10/Sep/15 ] |
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Andrew Perepechko (andrew.perepechko@seagate.com) uploaded a new patch: http://review.whamcloud.com/16360 |
| Comment by Gerrit Updater [ 22/Sep/15 ] |
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Oleg Drokin (oleg.drokin@intel.com) merged in patch http://review.whamcloud.com/16360/ |
| Comment by Peter Jones [ 23/Sep/15 ] |
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Landed for 2.8 |
| Comment by Bob Glossman (Inactive) [ 24/Sep/15 ] |
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the mod just landed to master doesn't cover all supported distros. is similar change needed in el7 and sles12? |
| Comment by Andrew Perepechko [ 24/Sep/15 ] |
The deadlock was fixed in vanilla kernel 3.8 and should not be needed for kernels based on vanilla 3.10 and vanilla 3.12. Please see a comment in gerrit. |
| Comment by James A Simmons [ 25/Sep/15 ] |
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Yes the fix he for the older distros is already in SLES12 and RHEL7. |
| Comment by Bob Glossman (Inactive) [ 25/Sep/15 ] |
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closed again |
| Comment by Gerrit Updater [ 23/Apr/16 ] |
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Andrew Perepechko (andrew.perepechko@seagate.com) uploaded a new patch: http://review.whamcloud.com/19747 |