Re: [PATCH 1/2] proc: report file/anon bit in /proc/pid/pagemap

[Konstantin Khlebnikov <khlebnikov@openvz.org>]

KOSAKI Motohiro wrote:
>> diff --git a/Documentation/vm/pagemap.txt b/Documentation/vm/pagemap.txt
>> index 4600cbe..7587493 100644
>> --- a/Documentation/vm/pagemap.txt
>> +++ b/Documentation/vm/pagemap.txt
>> @@ -16,7 +16,7 @@ There are three components to pagemap:
>>      * Bits 0-4   swap type if swapped
>>      * Bits 5-54  swap offset if swapped
>>      * Bits 55-60 page shift (page size = 1<<page shift)
>> -    * Bit  61    reserved for future use
>> +    * Bit  61    page is file-page or shared-anon
>>      * Bit  62    page swapped
>>      * Bit  63    page present
>
> hmm..
> Here says, file or shmem.
>
>
>> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
>> index 2d60492..bc3df31 100644
>> --- a/fs/proc/task_mmu.c
>> +++ b/fs/proc/task_mmu.c
>> @@ -700,6 +700,7 @@ struct pagemapread {
>>
>>   #define PM_PRESENT          PM_STATUS(4LL)
>>   #define PM_SWAP             PM_STATUS(2LL)
>> +#define PM_FILE             PM_STATUS(1LL)
>>   #define PM_NOT_PRESENT      PM_PSHIFT(PAGE_SHIFT)
>>   #define PM_END_OF_BUFFER    1
>
> But, this macro says it's file. it seems a bit misleading. ;-)

well... you know, shmem/shared-anon actually lays on tmpfs. so they really file-pages.

>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org.  For more info on Linux MM,
> see: http://www.linux-mm.org/ .
> Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
> Don't email:<a href=ilto:"dont@kvack.org">  email@kvack.org</a>

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>