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Clarify cache policy and usage of streaming hint in raid_gen()

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Andrea Mazzoleni 2026-09-04 09:58:58 +02:00
parent d96eecfd60
commit e9621ead4c
1 changed files with 4 additions and 0 deletions
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4
raid/raid.h
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@ -202,6 +202,10 @@ int raid_selftest(void);
* Entries may point to the same block buffer.
* @streaming Store policy hint: nonzero for streaming / non-temporal stores
* (bypassing cache) where supported, or 0 for normal cached / temporal stores.
* Use nonzero when generated output will not be read immediately by the CPU
* (e.g., parity queued for disk writes during sync), avoiding cache pollution.
* Use 0 when output will be consumed immediately by the CPU (e.g., in-memory
* parity verification or single-disk data recovery).
* Both modes produce bit-identical parity data. Backends without streaming
* stores ignore this hint.
*/