Re: alignment requirements for kmutex_t

On 3/30/25 10:14 AM, Beesdeckar wrote:
> Hello,
> I found that global variable of type kmutex_t is on many places defined 
> like:
> kmutex_t variable_name __cacheline_aligned;
> 
> Two questions,
> 1. Is __cacheline_aligned mandatory for global/static variables of type 
> kmutex in kernel space ?

No, it's a performance optimization only. Basically, avoid cache line 
sharing with something that is potentially highly contested.

Joerg