Re: [PATCH v2 0/1] bcache: track active bypass writes to prevent stale cache reads

[Coly Li]

> 2026年7月6日 15:39，Coly Li <colyli@xxxxxxx> 写道：
> 
>> u16 counters: I realized clamping at U16_MAX completely breaks the
>> decrement path. If an I/O burst exceeds 65,535 writes, clamping loses
>> the true count. The counter will drop to 0 prematurely while writes
>> are still in flight, leaving a window for stale reads.
>> 
> 
> Using u32 is good. For 100TB cache, the refcount pages may occupy around
                                                   ^^^^^^
                                                   This is a typo, should be backend.
> 100MB more or less memory. IMHO that's acceptable.

Coly Li