[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] Qemu hanging

From: Alex Bennée
Subject: Re: [Qemu-devel] Qemu hanging
Date: Thu, 27 Sep 2018 16:42:39 +0100
User-agent: mu4e 1.1.0; emacs 26.1.50

Filipe Manana <address@hidden> writes:

> Hello,
> Recently qemu started hanging when running fstests (xfstests) after
> upgrading the guests kernel (linux) from 4.15.x to 4.16. Nothing else
> changed in the host or guest, besides the kernel version in the guest.
> Running fstests always hangs when running either the test generic/299
> or generic/451. But it happens only when running all the generic tests
> in sequence, running any of those two tests in isolation doesn't hang
> qemu (so far at least).
> I tried with qemu versions 2.11.2,  2.12.1 and 3.0.0. It hangs with
> any of these versions. The issue happens with any linux kernel version
>>= 4.16 (including latest 4.19-rc5) in the guest.
> Initially I noticed this when testing btrfs with fstests but later
> checked that it happens as well when testing xfs.
> I captured a coredump (using qemu 3.0.0) and it's available at:
> https://www.dropbox.com/s/c3ntm5galaz4r83/core_dump.tar.xz?dl=0
> The stack traces of all the qemu threads are pasted here (not every helpful):
> https://friendpaste.com/hmCX2IG3VrA233uNtw1MP

If you can rebuild with:

  ./configure --enable-debug --extra-cflags="-O0 -g3 -fno-omit-frame-pointer"

You should be able to get more useful backtraces (and core-dumps).

> This happens on 2 different physical machines (x86_64, running
> different linux distros with different kernel versions) even when
> using new guests.
> qemu is invoked with the following script/config:
> https://friendpaste.com/hmCX2IG3VrA233uNuFRNc
> Anything else I can provide to help debug this?
> Thanks.

Alex Bennée

reply via email to

[Prev in Thread] Current Thread [Next in Thread]