Limit read lock holders - #968
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robertbaldyga merged 2 commits intoAug 5, 2026
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The access counter is 8 bit wide and its top value is reserved for the write lock, so no more than OCF_CACHE_LINE_ACCESS_MAX_RD readers can hold the entry at the same time. Incrementing the counter beyond that limit would make the entry indistinguishable from a write locked one, so the excess readers have to be put on the waiters list instead. Signed-off-by: Robert Baldyga <robert.baldyga@unvertical.com>
Signed-off-by: Robert Baldyga <robert.baldyga@unvertical.com>
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Related to Open-CAS/open-cas-linux#1771