On 7.03.2018 14:14, Qu Wenruo wrote:
>>> SHARED flag is determined after extent map merge, so here we can't rely
>>> on em here.
>> Shouldn't extent maps correspond to 1:1 disk-state. I.e. they are just
>> the memory cache of the extent state. So if we merge them, shouldn't we
>> also merge the on-disk extents as well ?
> Not 1:1.
> In memory one is merged maybe to save memory.
> But on-disk file extents has size limit.
> For compressed one it's 128K and 128M for uncompressed one.
Fair enough, however 4 extents, 16k each should warrant merging on-disk
as well, no ?
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html