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A comment on No nuances, just buggy code (was: related to Spinlock implementation). Parent comment

Re:No nuances, just buggy code (was: related to Spinlock imp... by xakahnx on Sunday January 05, 2020 @11:29AM (#21961988)
This is still a disaster with hyperthreading where you can have two threads contending for a lock on the same physical core.

Even if your thread won't be scheduled off the core I don't know if you might still have irqs stealing time during the critical section.

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Re:No nuances, just buggy code (was: related to Spinlock imp... by touisteur on Sunday January 05, 2020 @11:51AM (#21962144)
Can't you isolate cores from irqs with irq affinities? I'd be more worried by SMM stealing CPU time (ugh... talk about sad stories of 'real-time' Linux...).
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