Subject: Re: [PATCH v3] doc: Fix htmldocs build warnings of stallwarn.rst

From: "Leizhen (ThunderTown)" <[email-masked]>
Date: Sat, 26 Nov 2022 09:30:32 +0800

On 2022/11/24 14:22, Zhen Lei wrote:
> Documentation/RCU/stallwarn.rst:
> 401: WARNING: Literal block expected; none found.
> 428: WARNING: Literal block expected; none found.
> 445: WARNING: Literal block expected; none found.
> 459: WARNING: Literal block expected; none found.
> 468: WARNING: Literal block expected; none found.
> 
> The literal block need to be indented, so add two spaces to each line.
> 
> In addition, ':', which is used as a boundary in the literal block, is
> replaced by '|'.
> 
> Link: https://lore.kernel.org/linux-next/[email-masked]/
> Fixes: 3d2788ba4573 ("doc: Document CONFIG_RCU_CPU_STALL_CPUTIME=y stall information")
> Reported-by: Stephen Rothwell <[email-masked]>
> Signed-off-by: Zhen Lei <[email-masked]>
> ---
>  Documentation/RCU/stallwarn.rst | 56 ++++++++++++++++++---------------
>  1 file changed, 30 insertions(+), 26 deletions(-)
> 
> v2 --> v3:
> 1. Add "Link:", "Fixes:", "Reported-by:".
> 2. Remove a orphaned pipe (|).
> 3. Change ". ::" to "::"

Hi, Bagas Sanjaya:
  Do you have time to review this patch again? Your review comments are important
because you made comments in the previous version.

> 
> v1 --> v2:
> For the case that both colons need to be deleted, change "::" to expanded
> form or partially minimized form.
> 
> diff --git a/Documentation/RCU/stallwarn.rst b/Documentation/RCU/stallwarn.rst
> index c1e92dfef40d501..ca7b7cd806a16c9 100644
> --- a/Documentation/RCU/stallwarn.rst
> +++ b/Documentation/RCU/stallwarn.rst
> @@ -398,9 +398,9 @@ In kernels built with CONFIG_RCU_CPU_STALL_CPUTIME=y or booted with
>  rcupdate.rcu_cpu_stall_cputime=1, the following additional information
>  is supplied with each RCU CPU stall warning::
>  
> -rcu:          hardirqs   softirqs   csw/system
> -rcu:  number:      624         45            0
> -rcu: cputime:       69          1         2425   ==> 2500(ms)
> +  rcu:          hardirqs   softirqs   csw/system
> +  rcu:  number:      624         45            0
> +  rcu: cputime:       69          1         2425   ==> 2500(ms)
>  
>  These statistics are collected during the sampling period. The values
>  in row "number:" are the number of hard interrupts, number of soft
> @@ -412,22 +412,24 @@ in milliseconds.  Because user-mode tasks normally do not cause RCU CPU
>  stalls, these tasks are typically kernel tasks, which is why only the
>  system CPU time are considered.
>  
> -The sampling period is shown as follows:
> -:<------------first timeout---------->:<-----second timeout----->:
> -:<--half timeout-->:<--half timeout-->:                          :
> -:                  :<--first period-->:                          :
> -:                  :<-----------second sampling period---------->:
> -:                  :                  :                          :
> -:          snapshot time point    1st-stall                  2nd-stall
> +The sampling period is shown as follows::
>  
> +  |<------------first timeout---------->|<-----second timeout----->|
> +  |<--half timeout-->|<--half timeout-->|                          |
> +  |                  |<--first period-->|                          |
> +  |                  |<-----------second sampling period---------->|
> +  |                  |                  |                          |
> +             snapshot time point    1st-stall                  2nd-stall
>  
>  The following describes four typical scenarios:
>  
> -1. A CPU looping with interrupts disabled.::
> +1. A CPU looping with interrupts disabled.
>  
> -   rcu:          hardirqs   softirqs   csw/system
> -   rcu:  number:        0          0            0
> -   rcu: cputime:        0          0            0   ==> 2500(ms)
> +   ::
> +
> +     rcu:          hardirqs   softirqs   csw/system
> +     rcu:  number:        0          0            0
> +     rcu: cputime:        0          0            0   ==> 2500(ms)
>  
>     Because interrupts have been disabled throughout the measurement
>     interval, there are no interrupts and no context switches.
> @@ -440,11 +442,11 @@ The following describes four typical scenarios:
>  
>     This is similar to the previous example, but with non-zero number of
>     and CPU time consumed by hard interrupts, along with non-zero CPU
> -   time consumed by in-kernel execution.::
> +   time consumed by in-kernel execution::
>  
> -   rcu:          hardirqs   softirqs   csw/system
> -   rcu:  number:      624          0            0
> -   rcu: cputime:       49          0         2446   ==> 2500(ms)
> +     rcu:          hardirqs   softirqs   csw/system
> +     rcu:  number:      624          0            0
> +     rcu: cputime:       49          0         2446   ==> 2500(ms)
>  
>     The fact that there are zero softirqs gives a hint that these were
>     disabled, perhaps via local_bh_disable().  It is of course possible
> @@ -454,20 +456,22 @@ The following describes four typical scenarios:
>  
>  3. A CPU looping with preemption disabled.
>  
> -   Here, only the number of context switches is zero.::
> +   Here, only the number of context switches is zero::
>  
> -   rcu:          hardirqs   softirqs   csw/system
> -   rcu:  number:      624         45            0
> -   rcu: cputime:       69          1         2425   ==> 2500(ms)
> +     rcu:          hardirqs   softirqs   csw/system
> +     rcu:  number:      624         45            0
> +     rcu: cputime:       69          1         2425   ==> 2500(ms)
>  
>     This situation hints that the stalled CPU was looping with preemption
>     disabled.
>  
> -4. No looping, but massive hard and soft interrupts.::
> +4. No looping, but massive hard and soft interrupts.
> +
> +   ::
>  
> -   rcu:          hardirqs   softirqs   csw/system
> -   rcu:  number:       xx         xx            0
> -   rcu: cputime:       xx         xx            0   ==> 2500(ms)
> +     rcu:          hardirqs   softirqs   csw/system
> +     rcu:  number:       xx         xx            0
> +     rcu: cputime:       xx         xx            0   ==> 2500(ms)
>  
>     Here, the number and CPU time of hard interrupts are all non-zero,
>     but the number of context switches and the in-kernel CPU time consumed
> 

-- 
Regards,
  Zhen Lei