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Re: [Qemu-discuss] qemu-img convert stuck
From: |
David Lee |
Subject: |
Re: [Qemu-discuss] qemu-img convert stuck |
Date: |
Thu, 12 Apr 2018 10:16:07 +0800 |
On Thu, Apr 12, 2018 at 10:03 AM, Fam Zheng <address@hidden> wrote:
> On Thu, 04/12 09:51, David Lee wrote:
> > On Mon, Apr 9, 2018 at 3:35 AM, Benny Zlotnik <address@hidden>
> wrote:
> >
> > > $ gdb -p 13024 -batch -ex "thread apply all bt"
> > > [Thread debugging using libthread_db enabled]
> > > Using host libthread_db library "/lib64/libthread_db.so.1".
> > > 0x00007f98275cfaff in ppoll () from /lib64/libc.so.6
> > >
> > > Thread 1 (Thread 0x7f983e30ab00 (LWP 13024)):
> > > #0 0x00007f98275cfaff in ppoll () from /lib64/libc.so.6
> > > #1 0x000055b55cf59d69 in qemu_poll_ns ()
> > > #2 0x000055b55cf5ba45 in aio_poll ()
> > > #3 0x000055b55ceedc0f in bdrv_get_block_status_above ()
> > > #4 0x000055b55cea3611 in convert_iteration_sectors ()
> > > #5 0x000055b55cea4352 in img_convert ()
> > > #6 0x000055b55ce9d819 in main ()
> >
> >
> > My team caught this issue too after switching to CentOS 7.4 with qemu-img
> > 2.9.0
> > gdb shows exactly the same backtrace when the convert stuck, and we are
> on
> > NFS.
> >
> > Later we found the following:
> > 1. The stuck can happen on local storage, too.
> > 2. Replace qemu-img 2.9.0 with 2.6.0 and everything works smoothly again.
> >
> > BTW, we use "qemu-img convert" to convert qcow2 and its backing files
> into
> > a single qcow2 image.
>
> Maybe it is RHBZ 1508886?
>
> Fam
>
Thanks, Fam. We just tracked down to this BZ too and are about to trying
the commit ef6dada8b44e1e7c4bec5c1115903af9af415b50
--
Thanks,
Li Qun
- [Qemu-discuss] qemu-img convert stuck, Benny Zlotnik, 2018/04/08
- Re: [Qemu-discuss] qemu-img convert stuck, Nir Soffer, 2018/04/08
- Re: [Qemu-discuss] qemu-img convert stuck, David Lee, 2018/04/11
- Re: [Qemu-discuss] qemu-img convert stuck, Fam Zheng, 2018/04/11
- Re: [Qemu-discuss] qemu-img convert stuck,
David Lee <=
- Re: [Qemu-discuss] qemu-img convert stuck, David Lee, 2018/04/12
- Re: [Qemu-discuss] qemu-img convert stuck, Fam Zheng, 2018/04/12
- Re: [Qemu-discuss] qemu-img convert stuck, David Lee, 2018/04/12
- Re: [Qemu-discuss] qemu-img convert stuck, David Lee, 2018/04/18
- Re: [Qemu-discuss] qemu-img convert stuck, Fam Zheng, 2018/04/18
- Re: [Qemu-discuss] qemu-img convert stuck, Fam Zheng, 2018/04/18
- Re: [Qemu-discuss] qemu-img convert stuck, David Lee, 2018/04/18