linux-kernel - Re: [PATCH 0/4] compcache: in-memory compressed swapping v2

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Date:	Mon, 14 Sep 2009 09:34:29 +0530
From:	Nitin Gupta <ngupta@...are.org>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Ed Tomlinson <edt@....ca>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-mm-cc <linux-mm-cc@...top.org>
Subject: Re: [PATCH 0/4] compcache: in-memory compressed swapping v2

On Mon, Sep 14, 2009 at 12:37 AM, Hugh Dickins
<hugh.dickins@...cali.co.uk> wrote:
> On Sat, 12 Sep 2009, Nitin Gupta wrote:
>> On 09/10/2009 03:32 AM, Nitin Gupta wrote:
>> > Project home: http://compcache.googlecode.com/
>> >
>> > * Changelog: v2 vs initial revision
>> >   - Use 'struct page' instead of 32-bit PFNs in ramzswap driver and
>> >   xvmalloc.
>> >     This is to make these 64-bit safe.
>> >   - xvmalloc is no longer a separate module and does not export any symbols.
>> >     Its compiled directly with ramzswap block driver. This is to avoid any
>> >     last bit of confusion with any other allocator.
>> >   - set_swap_free_notify() now accepts block_device as parameter instead of
>> >     swp_entry_t (interface cleanup).
>> >   - Fix: Make sure ramzswap disksize matches usable pages in backing swap
>> >   file.
>> >     This caused initialization error in case backing swap file had
>> >     intra-page
>> >     fragmentation.
>>
>> Can anyone please review these patches for possible inclusion in 2.6.32?
>
> Sorry, I certainly wouldn't be able to review them for 2.6.32 myself.
>
> Since we're already in the merge window, and this work has not yet
> had exposure in mmotm (preferably) or linux-next, I really doubt
> anyone should be pushing it for 2.6.32.
>
> I'd be quite glad to see it and experiment with it in mmotm,
> so it could go into 2.6.33 if all okay.  And I now fully accept
> that the discard/trim situation is so hazy that you are quite
> right to be asking for your own well-defined notifier instead.
>
> But I'm not going to pretend to have reviewed it.
>

Thanks for the pointer Hugh -- I will try to post patches against mmotm later.

Nitin
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