Help with filing a [maybe] ZFS/mmap bug.
George Hartzell
hartzell at alerce.com
Tue Nov 12 04:49:37 UTC 2013
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.
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