Re: [PATCH V9 1/4] perf/core: Add PERF_SAMPLE_DATA_PAGE_SIZE

[Peter Zijlstra]

On Fri, Oct 09, 2020 at 11:09:27AM +0200, Peter Zijlstra wrote:
> @@ -7046,6 +7059,10 @@ static u64 __perf_get_page_size(struct m
>  		return 0;
>  	}
>  
> +	page = pte_page(*pte);
> +	if (PageHuge(page))
> +		return page_size(compound_head(page));

Argh, this misses pte_unmap()..

> +
>  	pte_unmap(pte);
>  	return PAGE_SIZE;
>  }