On Thu, Apr 10, 2025 at 07:21:17PM +0800, lirongqing wrote:
> From: Li RongQing <lirongqing@xxxxxxxxx>
>
> Make file-nr output the total allocated file handles, not per-cpu
> cache number, it's more precise, and not in hot path
>
> Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx>
> ---
That means grabbing a lock suddenly. Is there an actual use-case
behind this?
> fs/file_table.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/file_table.c b/fs/file_table.c
> index c04ed94..138114d 100644
> --- a/fs/file_table.c
> +++ b/fs/file_table.c
> @@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(get_max_files);
> static int proc_nr_files(const struct ctl_table *table, int write, void *buffer,
> size_t *lenp, loff_t *ppos)
> {
> - files_stat.nr_files = get_nr_files();
> + files_stat.nr_files = percpu_counter_sum_positive(&nr_files);
> return proc_doulongvec_minmax(table, write, buffer, lenp, ppos);
> }
>
> --
> 2.9.4
>
