From: Pekka Enberg <penberg@cs.helsinki.fi>
To: Robert Jennings <rcj@linux.vnet.ibm.com>
Cc: Nitin Gupta <ngupta@vflare.org>,
Greg Kroah-Hartman <gregkh@suse.de>,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 7/7] zram/xvmalloc: combine duplicate block delete code
Date: Sat, 29 Jan 2011 10:50:38 +0200 [thread overview]
Message-ID: <1296291038.30654.11.camel@jaguar> (raw)
In-Reply-To: <20110128150155.GH2062@linux.vnet.ibm.com>
On Fri, 2011-01-28 at 09:01 -0600, Robert Jennings wrote:
> This patch eliminates duplicate code. The remove_block_head function
> is a special case of remove_block which can be contained in remove_block
> without confusion.
>
> The portion of code in remove_block_head which was noted as "DEBUG ONLY"
> is now mandatory. Doing this provides consistent management of the double
> linked list of blocks under a freelist and makes this consolidation
> of delete block code safe. The first and last blocks will have NULL
> pointers in their previous and next page pointers respectively.
>
> Additionally, any time a block is removed from a free list the next and
> previous pointers will be set to NULL to avoid misuse outside xvmalloc.
>
> Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Looks OK to me but we should really get Nitin's ACK for this.
Reviewed-by: Pekka Enberg <penberg@kernel.org>
next prev parent reply other threads:[~2011-01-29 8:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-28 14:56 [PATCH 0/7][v2] zram/xvmalloc: 64K page fixes and optimizations Robert Jennings
2011-01-28 14:57 ` [PATCH 1/7] [v2] zram/vmalloc: Correct tunings to enable use with 64K pages Robert Jennings
2011-01-29 8:47 ` Pekka Enberg
2011-01-28 14:58 ` [PATCH 2/7] [v2] zram: Prevent overflow in logical block size Robert Jennings
2011-01-29 8:48 ` Pekka Enberg
2011-01-28 14:58 ` [PATCH 3/7] [v2] zram/xvmalloc: free bit block insertion optimization Robert Jennings
2011-01-29 8:48 ` Pekka Enberg
2011-01-28 14:59 ` [PATCH 4/7] [v2] zram/xvmalloc: create CONFIG_ZRAM_DEBUG for debug code Robert Jennings
2011-01-29 8:48 ` Pekka Enberg
2011-01-28 15:00 ` [PATCH 5/7] [v2] zram/xvmalloc: Close 32byte hole on 64bit CPUs Robert Jennings
2011-01-29 8:49 ` Pekka Enberg
2011-01-28 15:00 ` [PATCH 6/7] zram: Return zero'd pages on new reads Robert Jennings
2011-01-29 8:49 ` Pekka Enberg
2011-01-28 15:01 ` [PATCH 7/7] zram/xvmalloc: combine duplicate block delete code Robert Jennings
2011-01-29 8:50 ` Pekka Enberg [this message]
2011-01-31 13:31 ` Nitin Gupta
2011-01-29 8:47 ` [PATCH 0/7][v2] zram/xvmalloc: 64K page fixes and optimizations Pekka Enberg
2011-01-29 18:54 ` Robert Jennings
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