2018-01-11 0:36 GMT+08:00 weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>:
> bdi debugfs dir/file may create fail, add error log here.
>
> Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
> ---
> V1->V2:
> fix indentation and make log message more clear
>
> mm/backing-dev.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/mm/backing-dev.c b/mm/backing-dev.c
> index b5f940c..0a49665 100644
> --- a/mm/backing-dev.c
> +++ b/mm/backing-dev.c
> @@ -885,7 +885,9 @@ int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args)
> cgwb_bdi_register(bdi);
> bdi->dev = dev;
>
> - bdi_debug_register(bdi, dev_name(dev));
> + if (bdi_debug_register(bdi, dev_name(dev)))
> + pr_warn("blkdev %s: creation of bdi debugfs entries failed.\n",
> + dev_name(dev));
> set_bit(WB_registered, &bdi->wb.state);
>
> spin_lock_bh(&bdi_lock);
> --
Hi Jens,
madam has no permission to create debuts entry if SELINUX is enable at
Fedora and Centos,
and we have revert 6d0e4827b72 Revert "bdi: add error handle for
bdi_debug_register", that is to say
bdi debugfs is not the key component of block device, this patch just
add warning log.
Thanks
