[PATCH] Fixup for Numonyx M29W128 chips

Darius Augulis augulis.darius at gmail.com
Thu Mar 26 08:54:02 EDT 2009


I'm getting jffs2 errors after write to flash. I don't have the output 
log now, but the idea is that after write to flash, jffs2 does not find 
magic numbers anymore. File system is broken.
It's completely resolved when write buffers are not used. I could make 
patch which disables write buffer only for M29W128 chips. Anyway it's 
not working, one who needs more performace, is welcome to fix this in 
better way...


massimo cirillo wrote:
> Hi Darius,
> what kind of failure did you experiment with M29W?
> In my opinion, complete removal of the buffer program feature is not a
> good solution,
> because you are taking away an important feature of the device, that results in
> a very high performance decrease.
> Moreover, if you make the fix applicable to all devices with 0x227E device ID,
> you are removing the same feature from other devices too, such as M29EW
> that has a much bigger buffer thus resulting in a dramatic performance decrease
> for this device.

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