Re-entrancy of flash erase/write

[David Woodhouse]

rob at sysgo.de said:
>  Am I right in assuming that it is not possible to erase and/or write
> different blocks of the same flash chip concurrently ?

No - on some chips you can. Not most though.

> If so, where is the lock in the MTD code that would prevent concurrent
> execution of erase/write on the same chip by multiple processes ? 

In the chip drivers themselves. Grep for TASK_UNINTERRUPTIBLE in 
cfi_cmdset_0001.c, for example.


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dwmw2