linux-kernel - Re: [RFC PATCH] Report the shmid backing a VMA in maps

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Message-ID: <2f11576a0810042248v209cae42m3ed280f0489b8a0@mail.gmail.com>
Date:	Sun, 5 Oct 2008 14:48:39 +0900
From:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
To:	"Alexey Dobriyan" <adobriyan@...il.com>
Cc:	"Mel Gorman" <mel@....ul.ie>, akpm@...ux-foundation.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	"Adam Litke" <agl@...ibm.com>
Subject: Re: [RFC PATCH] Report the shmid backing a VMA in maps

2008/10/5 Alexey Dobriyan <adobriyan@...il.com>:
> On Sat, Oct 04, 2008 at 09:04:03PM +0900, KOSAKI Motohiro wrote:
>> In the other hand, huge page is often used via ipc shm, not mmap.
>> So, administrator often want to know relationship of memory region and shmid.
>>
>> Then, To add shmid attribute in /proc/{pid}/maps is useful.
>>
>>
>> In addition, shmid information is not only useful for huge page, but also for normal shm.
>> Then, this patch works well on normal shm.
>
>> 2000000000500000-2000000000900000 rw-s 00000000 00:09 0                  /SYSV00000000 (deleted) (shmid=0)
>> 2000000000900000-2000000000d00000 rw-s 00000000 00:09 32769              /SYSV00000000 (deleted) (shmid=32769)
>                                                        ^^^^^                                             ^^^^^
>
> shmid is already in place, and no, it's not a coincidence ;-)

Oops, Thanks very good information.
I'll drop this patch :)
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