20.01.2020 22:53, Eric Blake wrote: > On 1/20/20 11:28 AM, Vladimir Sementsov-Ogievskiy wrote: > >>>> I'm a bit not follow what you mean. I can just note, that dirty-bitmap.c >>>> part of meta bitmaps was recently removed, and hbitmap.c part I forgot to >>>> remove... >>> >>> Yes, but who used that dirty-bitmap.c interface? As far as I can tell, >>> nobody. >> >> Yes, as far as I know, nobody and never. >> >>> >>>> Meta bitmaps were intended to control live migration of bitmaps and to >>>> implement something like partial sync of bitmaps (write to qcow2 only >>>> changed part of bitmap), but migration implemented in other way >>>> (postcopy) and the second thing was not implemented. >>> >>> OK. I was wondering why they were implemented without ever having been >>> used (as far as I can tell). >>> >> >> It was too optimistic preparatory series. > > Matches my recollection (we had several ideas about how to tackle it; > meta-bitmaps was proposed as one idea and this code landed, but we never > actually finished that idea before a better one was actually coded, so this > has always been dead code). > >> >> (I can never finally understand, series - who a they or what is it? >> Plural or singular? > > English is funny; "series" is one of the few words that works as both > singular and plural (another example is "sheep").
OK, thanks) Actually, Russian has such words too (штаны=pants, ножницы=scissors, interesting that first examples which came in my mind has same feature in English too). > >> They were too optimistic series? Sounds weird.. > > My spin: "The original series was too optimistic." > >> And if one series is series, than what about several serieses? >> OK, let's say, it was too optimistic preparatory patch set :) >> >> > -- Best regards, Vladimir
