reduce readahead overheads on tmpfs mmap page faults
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- v1 Latest3 patches 0 repliesNew
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | readahead: return early when readahead is disabledmm/ | +6 | 0 replies | |
| 1/3 | readahead: return early when readahead is disabledmm/ | +6 | 0 replies | |
| 2/3 | readahead: reduce unnecessary mmap_miss increasesmm/ | +2 | 0 replies | |
| 2/3 | readahead: reduce unnecessary mmap_miss increasesmm/ | +2 | 0 replies | |
| 3/3 | readahead: trigger mmap sequential readahead on PG_readaheadmm/ | +2 | 0 replies | |
| 3/3 | readahead: trigger mmap sequential readahead on PG_readaheadmm/ | +2 | 0 replies | |
| 3/3 | readahead: trigger mmap sequential readahead on PG_readaheadmm/ | +2 | 0 replies |
Reviews trailers per patch
None of the 7 patches has a Reviewed-by or Acked-by.
| Patch | Tim Chen |
|---|---|
| 1/3 | T-b T-b |
| 1/3 | T-b T-b |
| 2/3 | T-b T-b |
| 2/3 | T-b T-b |
| 3/3 | T-b T-b T-b |
| 3/3 | T-b T-b T-b |
| 3/3 | T-b T-b T-b |
Trailers given in replies are filled; those carried in the patches from earlier versions are outlined with dashes.
Cover letter [PATCH 0/3] reduce readahead overheads on tmpfs mmap page faults
Andrew,
This kills unnessesary ra->mmap_miss and ra->prev_pos updates on every page fault when the readahead is disabled.
They fix the cache line bouncing problem in the mosbench exim benchmark, which does multi-threaded page faults on shared struct file on tmpfs.
Thanks,
Fengguang
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