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Re: [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for symbolic printing of gfp_flags

From Vlastimil Babka <vbabka@suse.cz>
Newsgroups linux.kernel
Subject Re: [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for symbolic printing of gfp_flags
Date 2015-11-25 11:30 +0100
Message-ID <qyFuO-4Xh-19@gated-at.bofh.it> (permalink)
References <qyl33-86O-5@gated-at.bofh.it> <qylcK-8af-25@gated-at.bofh.it> <qyDt0-3y9-11@gated-at.bofh.it>
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On 11/25/2015 09:16 AM, Joonsoo Kim wrote:
> On Tue, Nov 24, 2015 at 01:36:18PM +0100, Vlastimil Babka wrote:
>> --- a/include/trace/events/gfpflags.h
>> +++ b/include/trace/events/gfpflags.h
>> @@ -8,8 +8,8 @@
>>   *
>>   * Thus most bits set go first.
>>   */
>> -#define show_gfp_flags(flags)						\
>> -	(flags) ? __print_flags(flags, "|",				\
>> +
>> +#define __def_gfpflag_names						\
>>  	{(unsigned long)GFP_TRANSHUGE,		"GFP_TRANSHUGE"},	\
>>  	{(unsigned long)GFP_HIGHUSER_MOVABLE,	"GFP_HIGHUSER_MOVABLE"}, \
>>  	{(unsigned long)GFP_HIGHUSER,		"GFP_HIGHUSER"},	\
>> @@ -19,9 +19,13 @@
>>  	{(unsigned long)GFP_NOFS,		"GFP_NOFS"},		\
>>  	{(unsigned long)GFP_ATOMIC,		"GFP_ATOMIC"},		\
>>  	{(unsigned long)GFP_NOIO,		"GFP_NOIO"},		\
>> +	{(unsigned long)GFP_NOWAIT,		"GFP_NOWAIT"},		\
>> +	{(unsigned long)__GFP_DMA,		"GFP_DMA"},		\
>> +	{(unsigned long)__GFP_DMA32,		"GFP_DMA32"},		\
>>  	{(unsigned long)__GFP_HIGH,		"GFP_HIGH"},		\
>>  	{(unsigned long)__GFP_ATOMIC,		"GFP_ATOMIC"},		\
>>  	{(unsigned long)__GFP_IO,		"GFP_IO"},		\
>> +	{(unsigned long)__GFP_FS,		"GFP_FS"},		\
>>  	{(unsigned long)__GFP_COLD,		"GFP_COLD"},		\
>>  	{(unsigned long)__GFP_NOWARN,		"GFP_NOWARN"},		\
>>  	{(unsigned long)__GFP_REPEAT,		"GFP_REPEAT"},		\
>> @@ -36,8 +40,12 @@
>>  	{(unsigned long)__GFP_RECLAIMABLE,	"GFP_RECLAIMABLE"},	\
>>  	{(unsigned long)__GFP_MOVABLE,		"GFP_MOVABLE"},		\
>>  	{(unsigned long)__GFP_NOTRACK,		"GFP_NOTRACK"},		\
>> +	{(unsigned long)__GFP_WRITE,		"GFP_WRITE"},		\
>>  	{(unsigned long)__GFP_DIRECT_RECLAIM,	"GFP_DIRECT_RECLAIM"},	\
>>  	{(unsigned long)__GFP_KSWAPD_RECLAIM,	"GFP_KSWAPD_RECLAIM"},	\
>>  	{(unsigned long)__GFP_OTHER_NODE,	"GFP_OTHER_NODE"}	\
>> -	) : "GFP_NOWAIT"
>>  
>> +#define show_gfp_flags(flags)						\
>> +	(flags) ? __print_flags(flags, "|",				\
>> +	__def_gfpflag_names						\
>> +	) : "none"
> 
> How about moving this to gfp.h or something?
> Now, we use it in out of tracepoints so there is no need to keep it
> in include/trace/events/xxx.

Hm I didn't want to pollute such widely included header with such defines. And
show_gfp_flags shouldn't be there definitely as it depends on __print_flags.
What do others think?

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Thread

[PATCH v2 0/9] page_owner improvements for debugging Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:40 +0100
  [PATCH v2 4/9] mm, page_owner: copy page owner info during migration Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:40 +0100
  [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to static key Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:40 +0100
    Re: [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to  static key Michal Hocko <mhocko@kernel.org> - 2015-11-25 16:00 +0100
      Re: [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to  static key Vlastimil Babka <vbabka@suse.cz> - 2015-11-25 16:10 +0100
        Re: [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to  static key Peter Zijlstra <peterz@infradead.org> - 2015-11-25 16:30 +0100
          Re: [PATCH v2 3/9] mm, page_owner: convert page_owner_inited to  static key Michal Hocko <mhocko@kernel.org> - 2015-11-25 16:50 +0100
  [PATCH v2 2/9] mm, page_owner: print symbolic migratetype of both page and pageblock Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:40 +0100
    Re: [PATCH v2 2/9] mm, page_owner: print symbolic migratetype of  both page and pageblock Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-11-25 09:20 +0100
  [PATCH v2 8/9] mm, page_alloc: print symbolic gfp_flags on allocation failure Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:50 +0100
    Re: [PATCH v2 8/9] mm, page_alloc: print symbolic gfp_flags on  allocation failure Michal Hocko <mhocko@kernel.org> - 2015-11-25 15:40 +0100
  [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for symbolic printing of gfp_flags Vlastimil Babka <vbabka@suse.cz> - 2015-11-24 13:50 +0100
    Re: [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for  symbolic printing of gfp_flags Joonsoo Kim <iamjoonsoo.kim@lge.com> - 2015-11-25 09:20 +0100
      Re: [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for  symbolic printing of gfp_flags Vlastimil Babka <vbabka@suse.cz> - 2015-11-25 11:30 +0100
        Re: [PATCH v2 6/9] mm, debug: introduce dump_gfpflag_names() for symbolic printing of gfp_flags yalin wang <yalin.wang2010@gmail.com> - 2015-11-27 04:50 +0100
  Re: [PATCH v2 0/9] page_owner improvements for debugging Michal Hocko <mhocko@kernel.org> - 2015-11-25 15:40 +0100

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