From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave@sr71.net>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, penberg@kernel.org,
cl@linux-foundation.org
Subject: Re: [RFC][PATCH 5/9] mm: rearrange struct page
Date: Thu, 16 Jan 2014 02:20:01 +0200 [thread overview]
Message-ID: <20140116002001.GC8456@node.dhcp.inet.fi> (raw)
In-Reply-To: <20140114180055.21691733@viggo.jf.intel.com>
On Tue, Jan 14, 2014 at 10:00:55AM -0800, Dave Hansen wrote:
>
> From: Dave Hansen <dave.hansen@linux.intel.com>
>
> To make the layout of 'struct page' look nicer, I broke
> up a few of the unions. But, this has a cost: things that
> were guaranteed to line up before might not any more. To make up
> for that, some BUILD_BUG_ON()s are added to manually check for
> the alignment dependencies.
>
> This makes it *MUCH* more clear how the first few fields of
> 'struct page' get used by the slab allocators.
>
> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Looks much cleaner!
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
--
Kirill A. Shutemov
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WARNING: multiple messages have this Message-ID (diff)
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: Dave Hansen <dave@sr71.net>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
akpm@linux-foundation.org, penberg@kernel.org,
cl@linux-foundation.org
Subject: Re: [RFC][PATCH 5/9] mm: rearrange struct page
Date: Thu, 16 Jan 2014 02:20:01 +0200 [thread overview]
Message-ID: <20140116002001.GC8456@node.dhcp.inet.fi> (raw)
In-Reply-To: <20140114180055.21691733@viggo.jf.intel.com>
On Tue, Jan 14, 2014 at 10:00:55AM -0800, Dave Hansen wrote:
>
> From: Dave Hansen <dave.hansen@linux.intel.com>
>
> To make the layout of 'struct page' look nicer, I broke
> up a few of the unions. But, this has a cost: things that
> were guaranteed to line up before might not any more. To make up
> for that, some BUILD_BUG_ON()s are added to manually check for
> the alignment dependencies.
>
> This makes it *MUCH* more clear how the first few fields of
> 'struct page' get used by the slab allocators.
>
> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Looks much cleaner!
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
--
Kirill A. Shutemov
next prev parent reply other threads:[~2014-01-16 0:20 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-14 18:00 [RFC][PATCH 0/9] re-shrink 'struct page' when SLUB is on Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-14 18:00 ` [RFC][PATCH 1/9] mm: slab/slub: use page->list consistently instead of page->lru Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-14 19:31 ` Christoph Lameter
2014-01-14 19:31 ` Christoph Lameter
2014-01-15 2:31 ` David Rientjes
2014-01-15 2:31 ` David Rientjes
2014-01-15 6:58 ` Dave Hansen
2014-01-15 6:58 ` Dave Hansen
2014-01-15 7:16 ` David Rientjes
2014-01-15 7:16 ` David Rientjes
2014-01-16 0:11 ` Kirill A. Shutemov
2014-01-16 0:11 ` Kirill A. Shutemov
2014-01-14 18:00 ` [RFC][PATCH 2/9] mm: slub: abstract out double cmpxchg option Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-14 19:49 ` Christoph Lameter
2014-01-14 19:49 ` Christoph Lameter
2014-01-14 21:41 ` Dave Hansen
2014-01-14 21:41 ` Dave Hansen
2014-01-15 2:37 ` David Rientjes
2014-01-15 2:37 ` David Rientjes
2014-01-16 16:45 ` Christoph Lameter
2014-01-16 16:45 ` Christoph Lameter
2014-01-16 17:13 ` Dave Hansen
2014-01-16 17:13 ` Dave Hansen
2014-01-14 18:00 ` [RFC][PATCH 3/9] mm: page->pfmemalloc only used by slab/skb Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-14 19:49 ` Christoph Lameter
2014-01-14 19:49 ` Christoph Lameter
2014-01-14 22:17 ` Dave Hansen
2014-01-14 22:17 ` Dave Hansen
2014-01-15 2:45 ` David Rientjes
2014-01-15 2:45 ` David Rientjes
2014-01-16 0:16 ` Kirill A. Shutemov
2014-01-16 0:16 ` Kirill A. Shutemov
2014-01-14 18:00 ` [RFC][PATCH 4/9] mm: slabs: reset page at free Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-15 2:48 ` David Rientjes
2014-01-15 2:48 ` David Rientjes
2014-01-16 18:35 ` Dave Hansen
2014-01-16 18:35 ` Dave Hansen
2014-01-16 18:32 ` Christoph Lameter
2014-01-16 18:32 ` Christoph Lameter
2014-01-14 18:00 ` [RFC][PATCH 5/9] mm: rearrange struct page Dave Hansen
2014-01-14 18:00 ` Dave Hansen
2014-01-16 0:20 ` Kirill A. Shutemov [this message]
2014-01-16 0:20 ` Kirill A. Shutemov
2014-01-16 18:34 ` Christoph Lameter
2014-01-16 18:34 ` Christoph Lameter
2014-01-16 22:29 ` Dave Hansen
2014-01-16 22:29 ` Dave Hansen
2014-01-17 14:58 ` Christoph Lameter
2014-01-17 14:58 ` Christoph Lameter
2014-01-14 18:01 ` [RFC][PATCH 6/9] mm: slub: rearrange 'struct page' fields Dave Hansen
2014-01-14 18:01 ` Dave Hansen
2014-01-14 18:01 ` [RFC][PATCH 7/9] mm: slub: remove 'struct page' alignment restrictions Dave Hansen
2014-01-14 18:01 ` Dave Hansen
2014-01-14 18:01 ` [RFC][PATCH 8/9] mm: slub: cleanups after code churn Dave Hansen
2014-01-14 18:01 ` Dave Hansen
2014-01-14 18:01 ` [RFC][PATCH 9/9] mm: fix alignment checks on 32-bit Dave Hansen
2014-01-14 18:01 ` Dave Hansen
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