linux-kernel - Re: [PATCH 3/3] oom, trace: add compaction retry tracepoint

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Date:   Wed, 4 Jan 2017 15:49:54 +0100
From:   Vlastimil Babka <vbabka@...e.cz>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] oom, trace: add compaction retry tracepoint

On 01/04/2017 11:56 AM, Michal Hocko wrote:
> On Wed 04-01-17 11:47:56, Vlastimil Babka wrote:
>> On 12/20/2016 02:01 PM, Michal Hocko wrote:
>>> From: Michal Hocko <mhocko@...e.com>
>>
>> --------8<--------
>> From: Vlastimil Babka <vbabka@...e.cz>
>> Date: Wed, 4 Jan 2017 11:44:09 +0100
>> Subject: [PATCH] oom, trace: add compaction retry tracepoint-fix
>>
>> Let's print the compaction priorities lower-case and without
>> prefix for consistency.
>>
>> Also indent fix in compact_result_to_feedback().
>>
>> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> 
> I would just worry that c&p constant name is easier to work with when
> vim -t $PRIO or git grep $PRIO. But if the lowercase and shorter sounds
> better to you then no objections from me.

Yeah, valid point, but since we didn't do that until now, let's stay
consistent.

>> ---
>>  include/trace/events/mmflags.h | 8 ++++----
>>  1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h
>> index aa4caa6914a9..e4c3a0febcce 100644
>> --- a/include/trace/events/mmflags.h
>> +++ b/include/trace/events/mmflags.h
>> @@ -195,7 +195,7 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY,	"softdirty"	)		\
>>  
>>  #define compact_result_to_feedback(result)	\
>>  ({						\
>> - 	enum compact_result __result = result;	\
>> +	enum compact_result __result = result;	\
>>  	(compaction_failed(__result)) ? COMPACTION_FAILED : \
>>  		(compaction_withdrawn(__result)) ? COMPACTION_WITHDRAWN : COMPACTION_PROGRESS; \
>>  })
>> @@ -206,9 +206,9 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY,	"softdirty"	)		\
>>  	EMe(COMPACTION_PROGRESS,	"progress")
>>  
>>  #define COMPACTION_PRIORITY						\
>> -	EM(COMPACT_PRIO_SYNC_FULL,	"COMPACT_PRIO_SYNC_FULL")	\
>> -	EM(COMPACT_PRIO_SYNC_LIGHT,	"COMPACT_PRIO_SYNC_LIGHT")	\
>> -	EMe(COMPACT_PRIO_ASYNC,		"COMPACT_PRIO_ASYNC")
>> +	EM(COMPACT_PRIO_SYNC_FULL,	"sync_full")	\
>> +	EM(COMPACT_PRIO_SYNC_LIGHT,	"sync_light")	\
>> +	EMe(COMPACT_PRIO_ASYNC,		"async")
>>  #else
>>  #define COMPACTION_STATUS
>>  #define COMPACTION_PRIORITY
>> -- 
>> 2.11.0
>>
>