On Tue, 17 Nov 2020 14:08:02 +0900, Wonhyuk Yang said: > > > > dc ivac,x1 // invalidate a cache line that's probably OK > > > > str w0,[x1 // and now we do a store that leaves a possibly stale > > > > cache line
> Could you explain me why the store still leaves stale cache? > We invalidated the cacheline and store will not make footprint in the cache. There's a race condition... Invalidate the cache line.... then another CPU manages to fetch the cache line. and then we do a store that doesn't update the cache - and the other CPU is still looking at the old data.
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