Re: [PATCH v2] block: invalidate cached plug timestamp after task switch

[Peter Zijlstra]

On Fri, Jun 12, 2026 at 02:40:42AM -0700, Usama Arif wrote:

> +static __always_inline void blk_plug_invalidate_ts(void)
>  {
> +	if (unlikely(current->flags & PF_BLOCK_TS)) {
> +		struct blk_plug *plug = current->plug;
>  
> +		if (plug)
> +			plug->cur_ktime = 0;
> +		current->flags &= ~PF_BLOCK_TS;
> +	}
>  }

If you can guarantee PF_BLOCK_TS is only ever set when current->plug,
this can be reduced further.