llseek bug in amd64 host

[Gustavo Niemeyer]

======================================================
SRU justification:
1. Impact: llseek fails on amd64 host emulating arm
2. How addressed: a patch from upstream to address this bug is cherrypicked.
3. Patch: see the patch in comment #1
4. To reproduce: call llseek on arm emulated guest on amd64 host
5. Regression potential: this only touches llseek64 emulation on x86-64 host.
======================================================

Binary package hint: qemu-kvm

It's been reported in the Go mailing list that llseek is failing on an amd64 host when emulating arm.

The attached patch was recommended as a possible fix for the problem.

The full conversation may be found in the following thread:

http://groups.google.com/group/golang-dev/t/ab503dc63abe5dfd

[Gustavo Niemeyer (niemeyer)]

There are packages available for testing in my PPA:

sudo add-apt-repository ppa:niemeyer/ppa
sudo apt-get upgrade

[Peter Maydell (pmaydell)]

Suggested patch sent upstream: http://patchwork.ozlabs.org/patch/83964/

I'll put this in qemu-linaro 2011.03 one way or another.

[Gustavo Niemeyer (niemeyer)]

That's awesome, thanks Peter.

[Serge Hallyn (serge-hallyn)]

Thanks for the patch, Gustavo.

qemu-kvm no longer ships an arm emulator in natty. So if I understand the SRU process right, I'll need to wait until this is fixed in qemu-linaro, then request an SRU to qemu-kvm for lucid and maverick?

In the mean time I'll link source branches for both of those to this bug so we're ready.

[Serge Hallyn (serge-hallyn)]

.debs for lucid and maverick have been built (not yet tested). I will upload them when I've got a wider pipe.

[Serge Hallyn (serge-hallyn)]

@Gustavo,

do the packages in comment #7 fix the problem for you?

[Martin Capitanio (capnm)]

I can confirm that Gustavo's Maverick amd64 ppa packages
https://launchpad.net/~niemeyer/+archive/ppa/+packages

fixed the go os test issue that I filled here
http://code.google.com/p/go/issues/detail?id=1508#c1

=== RUN os_test.TestSeek
--- PASS: os_test.TestSeek (0.0 seconds)

Thanks for pushing this upstream,
Martin

[Serge Hallyn (serge-hallyn)]

I believe comment #9 can be seen as verifying the fix, as Gustavo's tree just added the exact same patch as mine. Can we therefore mark this bug as 'verification-done'?

[Rolf Leggewie (r0lf)]

Maverick has long since stopped to receive any updates. Marking the Maverick task for this ticket as "Won't Fix".

[Rolf Leggewie (r0lf)]

lucid has seen the end of its life and is no longer receiving any updates. Marking the lucid task for this ticket as "Won't Fix".