Date: Mon, 11 Nov 2013 20:40:45 -0800 From: George Hartzell <hartzell@alerce.com> To: "Steven Hartland" <smh@freebsd.org> Cc: freebsd-stable@FreeBSD.org, hartzell@alerce.com, re@freebsd.org, Andriy Gapon <avg@FreeBSD.org> Subject: Re: Help with filing a [maybe] ZFS/mmap bug. Message-ID: <21121.45389.448300.198867@gargle.gargle.HOWL> In-Reply-To: <4EB902F80CE84DD2BF36C85EF4CE8EF8@multiplay.co.uk> References: <20967.760.95825.310085@gargle.gargle.HOWL> <51E80B30.1090004@FreeBSD.org> <20968.10645.880772.30501@gargle.gargle.HOWL> <520202E5.30300@FreeBSD.org> <20994.55913.93606.436124@gargle.gargle.HOWL> <FEE7BDCF7F494EE1BA0BE9424275AA91@multiplay.co.uk> <21111.12085.958991.356982@gargle.gargle.HOWL> <4EB902F80CE84DD2BF36C85EF4CE8EF8@multiplay.co.uk>
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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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