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Implement synchronous fast path - #994
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Signed-off-by: Robert Baldyga <robert.baldyga@unvertical.com>
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The current implementation of fast path is a remnant after request-based I/O handling in OpenCAS Linux. Since OCL switched to submit_bio there was not caller that would use opportunistic fast path call, so it got merged as an option in regular I/O path. The major problem is that it is still designed for bio/rq split, while in reality all the submits arrive sychronously, thus sync/async split makes way more sense today. Therefore this commit introduces a new fast path that attempts to quickly handle I/O synchronously and if fails fast if optimistic sync path is not possible. Signed-off-by: Robert Baldyga <robert.baldyga@unvertical.com>
Signed-off-by: Robert Baldyga <robert.baldyga@unvertical.com>
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November 3, 2026 22:55
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