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Date: Fri, 10 Jul 2009 08:50:33 +0800
From: Eric Miao <eric.y.miao@gmail.com>
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To: Daniel Mack <daniel@caiaq.de>
Subject: Re: PXA3xx NAND driver trouble with 'conservative' CPU govenor
References: <20090709190137.GW19257@buzzloop.caiaq.de>
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Daniel Mack wrote:
> With the cpu govenor set to 'conservative', the PXA3xx NAND driver fails
> the tests from drivers/mtd/tests:
> 
> sh-3.2# modprobe mtd_torturetest dev=3
> [  386.367730]
> [  386.369296] =================================================
> [  386.375258] mtd_torturetest: Warning: this program is trying to wear out your flash, stop it if this is not wanted.
> [  386.385811] mtd_torturetest: MTD device: 3
> [  386.390021] mtd_torturetest: torture 32 eraseblocks (8-39) of mtd3
> [  386.396238] mtd_torturetest: write verify enabled
> [  388.675993] double bit error @ page 00000b79
> [  388.680406] timed out writing command
> [  388.687925] mtd_torturetest: error -74 while reading EB 36, read 131072
> [  388.694536] mtd_torturetest: verify failed for 0xFF... pattern
> [  388.700364] mtd_torturetest: finished after 0 erase cycles
> [  388.705885] mtd_torturetest: error -74 occurred during torturing
> [  388.711908] =================================================
> modprobe: Failed to load module mtd_torturetest: Bad message.
> 
> When setting the govenor to 'performance', the test passes. Has anyone
> seen similar issues? Any idea, anyone?

What's the current CPU freq when in conservative? cat /proc/cpuinfo?

> 
> Daniel
>