Help with filing a [maybe] ZFS/mmap bug.

[George Hartzell]

Steven Hartland writes:
 > [...]
 > @George when you got corruption what did the files look like? I ask as
 > here I see lots of zeros as through the file size was correct but pretty
 > much blanked.

I had small changes.  I discussed it a bit here.

https://groups.google.com/forum/#!topic/fa.freebsd.stable/7xvY8ffWGpw

 > 
 > @avg what was your thinking behind what may be the issue here?
 > 
 > If this is a mmap bug in zfs its a pretty serious one given the amount
 > of silent corruption you can get.

Yeah, I have about 150 cd's to rerip someday.  Now I run flac -t to
validate them.

 > @re Although reported incidents appear to be rare as its silent data
 > corruption users may be blissfully unaware its happening. Given that
 > my gut feeling is this is serious enough that we need to get something
 > in place before 10 release, even if this is make ZFS report ENOTSUP
 > for mmap calls, would you agree?

Let me know if I can help.

g.