Re: [PATCH 5/5] zfs extensible_dataset and large_blocks feature support

[Andrei Borzenkov <arvidjaar@gmail.com>]

В Sun, 03 May 2015 22:47:40 +0300
Toomas Soome <tsoome@me.com> пишет:

> 
> > On 03.05.2015, at 22:23, Andrei Borzenkov <arvidjaar@gmail.com> wrote:
> > 
> >>> 
> >> 
> >> they do implement read support extensible dataset… instead of fixed DMU types they dont specify type, making it possible to use fat zap objects from bonus area. 
> >> 
> >> reference commit:
> >> https://github.com/illumos/illumos-gate/commit/2acef22db7808606888f8f92715629ff3ba555b9
> >> 
> > 
> > OK; just to be sure - there are several remaining uses of
> > DMU_OT_DSL_DATASET and DMU_OT_DSL_DIR; are these intentional?
> 
> 
> they *should* be ok. at least browsing and loading files from datasets haven’t revealed other instances over the test time. but problem is, the cases of zapify (when “normal” structure is wrapped as zap object) I have seen, have been related to datasets using >128k recordsize, and its possible some cases may have been missed - the grub zfs code and real zfs code are not exactly easy to compare. at least so far I haven’t seen bugs related to this nor received any reports. the basic symptom can be either message about wrong type or “missing” directory entry in listing.
> 


Can https://savannah.gnu.org/bugs/?44448 be somehow related?