Date: Sun, 04 Oct 2009 17:13:23 +0200 From: "Arno J. Klaassen" <arno@heho.snv.jussieu.fr> To: Dmitry Marakasov <amdmi3@amdmi3.ru> Cc: freebsd-current@freebsd.org Subject: Re: Data corruption with checksum offloading enabled Message-ID: <wpeipj2nvw.fsf@heho.snv.jussieu.fr> In-Reply-To: <20090814021340.GA1275@hades.panopticon> (Dmitry Marakasov's message of "Fri\, 14 Aug 2009 06\:13\:40 %2B0400") References: <20090123221826.GB30982@deprived.panopticon> <20090126144044.GB6054@hades.panopticon> <wphc3kj4sb.fsf@heho.snv.jussieu.fr> <20090127164617.GA93440@hades.panopticon> <wpy6wwiqjk.fsf@heho.snv.jussieu.fr> <20090128042148.GA1256@hades.panopticon> <20090814021340.GA1275@hades.panopticon>
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Hello,
Dmitry Marakasov <amdmi3@amdmi3.ru> writes:
> * Dmitry Marakasov (amdmi3@amdmi3.ru) wrote:
>
>> 3. 512MB random bytes with NFS: 2/5 correct
>
> Just for the record: this no longer seems to be a problem. Recent
> 8-STABLE, ale works fine with rxcsum/txcsum, at least I could not
> reproduce the problem with similar tests as before.
bon, I upgraded the box with this problem to *7*-STABLE this
weekend, and no luck, the problem still persists.
To refresh memory, nfs-client has data corrupt in a particular way :
- just one byte (per file) in my case, a single 128 byte block for Dimitry
- independent of network driver and NFS-[options|client versions]
- seems nfs-limited (netcat file transfers work OK (zero-only nfs as well))
- disabling checksum offloading at least makes it much harder to provoke
(cann't remembre whether everyone confirmed this)
- disabling cpufreq makes it impossible to provoke
(at least for me)
So far the bad news, the better news is that I cannot reproduce
this problem on a similar setup running *8*-STABLE indeed.
The 7-STABLE box is in production, but involved in some
maintenaince/upgrade-shuffle I am responsable for, I will try
to let it at least boot a 8-kernel and 7-world sometime next
week and see if I can still reproduce the problem.
Best, Arno
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