Am 07.08.2012 06:21, schrieb Artem Bityutskiy: > On Mon, 2012-08-06 at 19:36 +0200, Richard Weinberger wrote: >> I think we enable fastmap only if a MTD device has more than >> UBI_FM_MAX_START*2 PEBs. >> Any comments? > > With double space one can make it power-cut tolerant, because you should > be able to have either old or new fastmap at any point of time.
UBI_FM_MAX_START*2 has nothing do to with the Fastmap size. IMHO we need a threshold where Fastmap makes sense. Technically Fastmap can only be used if a MTD device has >= UBI_FM_MAX_START PEBs. But does this makes sense? Fastmap was invented to speedup attaching on *large* MTDs, The benefit in small MTDs is very little. Thanks, //richard
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