From: Charles Manning <manningc2@actrix.gen.nz>
To: linux-mtd@lists.infradead.org
Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Sukumar Ghorai <s-ghorai@ti.com>
Subject: Re: [PATCH v6 0/7] nand prefetch-irq support and ecc layout chanage
Date: Mon, 20 Dec 2010 10:45:53 +1300 [thread overview]
Message-ID: <201012201045.53688.manningc2@actrix.gen.nz> (raw)
In-Reply-To: <1290785677-16005-1-git-send-email-s-ghorai@ti.com>
On Saturday 27 November 2010 04:34:30 Sukumar Ghorai wrote:
> The following set of patches applies on linux-2.6.
>
> The main motivations behind this patch series are -
> 1. support NAND I/O in irq mode.
> 2. support of different ECC schema.
> 3. also to make ecc layout as like in romcode ecc layout
Why change the ECC layout?
Be very careful when you change ECC layouts. This can break production
systems.
For example if people are running something earlier and then want to deliver a
new kernel with 2.6.37 then their existing NAND file systems will no longer
be readable.
Changes to ECC should only be done for very good reasons and should be
controlled with a Kconfig with the default being the existing ECC layout.
-- Charles
WARNING: multiple messages have this Message-ID (diff)
From: Charles Manning <manningc2@actrix.gen.nz>
To: linux-mtd@lists.infradead.org
Cc: Sukumar Ghorai <s-ghorai@ti.com>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 0/7] nand prefetch-irq support and ecc layout chanage
Date: Mon, 20 Dec 2010 10:45:53 +1300 [thread overview]
Message-ID: <201012201045.53688.manningc2@actrix.gen.nz> (raw)
In-Reply-To: <1290785677-16005-1-git-send-email-s-ghorai@ti.com>
On Saturday 27 November 2010 04:34:30 Sukumar Ghorai wrote:
> The following set of patches applies on linux-2.6.
>
> The main motivations behind this patch series are -
> 1. support NAND I/O in irq mode.
> 2. support of different ECC schema.
> 3. also to make ecc layout as like in romcode ecc layout
Why change the ECC layout?
Be very careful when you change ECC layouts. This can break production
systems.
For example if people are running something earlier and then want to deliver a
new kernel with 2.6.37 then their existing NAND file systems will no longer
be readable.
Changes to ECC should only be done for very good reasons and should be
controlled with a Kconfig with the default being the existing ECC layout.
-- Charles
WARNING: multiple messages have this Message-ID (diff)
From: manningc2@actrix.gen.nz (Charles Manning)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 0/7] nand prefetch-irq support and ecc layout chanage
Date: Mon, 20 Dec 2010 10:45:53 +1300 [thread overview]
Message-ID: <201012201045.53688.manningc2@actrix.gen.nz> (raw)
In-Reply-To: <1290785677-16005-1-git-send-email-s-ghorai@ti.com>
On Saturday 27 November 2010 04:34:30 Sukumar Ghorai wrote:
> The following set of patches applies on linux-2.6.
>
> The main motivations behind this patch series are -
> 1. support NAND I/O in irq mode.
> 2. support of different ECC schema.
> 3. also to make ecc layout as like in romcode ecc layout
Why change the ECC layout?
Be very careful when you change ECC layouts. This can break production
systems.
For example if people are running something earlier and then want to deliver a
new kernel with 2.6.37 then their existing NAND file systems will no longer
be readable.
Changes to ECC should only be done for very good reasons and should be
controlled with a Kconfig with the default being the existing ECC layout.
-- Charles
next prev parent reply other threads:[~2010-12-19 21:46 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-26 15:34 [PATCH v6 0/7] nand prefetch-irq support and ecc layout chanage Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` [PATCH 1/7] omap3630: nand: fix device size to work in polled mode Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-12-18 0:03 ` Tony Lindgren
2010-12-18 0:03 ` Tony Lindgren
2010-12-22 9:24 ` Ghorai, Sukumar
2010-12-22 9:24 ` Ghorai, Sukumar
2010-11-26 15:34 ` [PATCH 2/7] omap3: nand: configurable transfer type per board Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-12-18 0:08 ` Tony Lindgren
2010-12-18 0:08 ` Tony Lindgren
2010-12-22 7:52 ` Ghorai, Sukumar
2010-12-22 7:52 ` Ghorai, Sukumar
2010-11-26 15:34 ` [PATCH v6 3/7] omap: gpmc: enable irq mode in gpmc Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-12-18 0:09 ` Tony Lindgren
2010-12-18 0:09 ` Tony Lindgren
2010-12-22 8:00 ` Ghorai, Sukumar
2010-12-22 8:00 ` Ghorai, Sukumar
2010-11-26 15:34 ` [PATCH v6 4/7] omap3: nand: prefetch in irq mode support Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` [PATCH v6 5/7] omap3: nand: configurable fifo threshold to gain the throughput Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` [PATCH v6 6/7] omap: nand: ecc layout select from board file Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` [PATCH v6 7/7] omap: nand: making ecc layout as compatible with romcode ecc Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 15:34 ` Sukumar Ghorai
2010-11-26 17:57 ` [PATCH v6 0/7] nand prefetch-irq support and ecc layout chanage Ghorai, Sukumar
2010-12-02 4:09 ` Charles Manning
2010-12-19 21:45 ` Charles Manning [this message]
2010-12-19 21:45 ` Charles Manning
2010-12-19 21:45 ` Charles Manning
2010-12-22 7:43 ` Ghorai, Sukumar
2010-12-22 7:43 ` Ghorai, Sukumar
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