linux-kernel - Re: [Devel] [PATCH 6/6] BC: kernel memory accounting (marks)

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Message-ID: <44F40E76.5000809@sw.ru>
Date:	Tue, 29 Aug 2006 13:52:54 +0400
From:	Kirill Korotaev <dev@...ru>
To:	devel@...nvz.org
CC:	Andrew Morton <akpm@...l.org>, Rik van Riel <riel@...hat.com>,
	Chandra Seetharaman <sekharan@...ibm.com>,
	Greg KH <greg@...ah.com>, Andi Kleen <ak@...e.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrey Savochkin <saw@...ru>,
	Matt Helsley <matthltc@...ibm.com>,
	Rohit Seth <rohitseth@...gle.com>,
	Oleg Nesterov <oleg@...sign.ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [Devel] [PATCH 6/6] BC: kernel memory accounting (marks)

Dave Hansen wrote:
> I'm still a bit concerned about if we actually need the 'struct page'
> pointer.  I've gone through all of the users, and I'm not sure that I
> see any that _require_ having a pointer in 'struct page'.  I think it
> will take some rework, especially with the pagetables, but it should be
> quite doable.
don't worry:
1. we will introduce a separate patch moving this pointer
  into mirroring array
2. this pointer is still required for _user_ pages tracking,
  that's why I don't follow your suggestion right now...

> vmalloc:
> 	Store in vm_struct
> fd_set_bits:
> poll_get:
> mount hashtable:
> 	Don't need alignment.  use the slab?
> pagetables:
> 	either store in an extra field of 'struct page', or use the
> 	mm's.  mm should always be available when alloc/freeing a
> 	pagetable page
> 
> Did I miss any?
flocks, pipe buffers, task_struct, sighand, signal, vmas,
posix timers, uid_cache, shmem dirs, 

Thanks,
Kirill
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