On Mon, Jul 20, 2020 at 04:07PM +0206, John Ogness wrote:
> With commit ("printk: use the lockless ringbuffer"), printk()
> started silently dropping messages without text because such
> records are not supported by the new printk ringbuffer.
>
> Add support for such records.
>
> Currently dataless records are denoted by INVALID_LPOS in order
> to recognize failed prb_reserve() calls. Change the ringbuffer
> to instead use two different identifiers (FAILED_LPOS and
> NO_LPOS) to distinguish between failed prb_reserve() records and
> successful dataless records, respectively.
>
> Fixes: ("printk: use the lockless ringbuffer")
> Fixes: https://lkml.kernel.org/r/[email protected]
> Signed-off-by: John Ogness <[email protected]>
> ---
> based on next-20200720
>
> kernel/printk/printk_ringbuffer.c | 58 ++++++++++++++-----------------
> kernel/printk/printk_ringbuffer.h | 15 ++++----
> 2 files changed, 35 insertions(+), 38 deletions(-)
Thanks! Ran a couple tests and sanitizer report blank lines are back
where they're expected.
Tested-by: Marco Elver <[email protected]>
