[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920/ubuntu-18.04 Status: Fix Committed => Fix Released ** No longer affects: kunpeng920/ubuntu-18.04-hwe ** Changed in: kunpeng920 Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of qemu- devel-ml, which is

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This bug was fixed in the package qemu - 1:2.11+dfsg-1ubuntu7.31 --- qemu (1:2.11+dfsg-1ubuntu7.31) bionic-security; urgency=medium * SECURITY UPDATE: out-of-bounds read in slirp networking - debian/patches/CVE-2020-10756.patch: drop bogus IPv6 messages in slirp/src/ip6_in

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920/ubuntu-18.04-hwe Status: Triaged => Fix Committed ** Changed in: kunpeng920/ubuntu-18.04 Status: Triaged => Fix Committed ** Changed in: kunpeng920 Status: Triaged => Fix Committed -- You received this bug notification because you are a member of q

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Verified w/ over 500 successful iterations on a m6g.metal instance, and over 300 in an armhf chroot on the same. ** Tags removed: verification-needed verification-needed-bionic ** Tags added: verification-done verification-done-bionic -- You received this bug notification because you are a membe

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Hello dann, or anyone else affected, Accepted qemu into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/qemu/1:2.11+dfsg- 1ubuntu7.30 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See https:/

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I just pushed/uploaded a SRU for bionic from: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/387269 Waiting for SRU on it. ** Changed in: qemu (Ubuntu Bionic) Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned) -- You received this bug notificati

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Description changed: + + SRU TEAM REVIEWER: This has already been SRUed for Focal, Eoan and Bionic. Unfortunately the Bionic SRU did not work and we had to reverse the change. Since then we had another update and now I'm retrying the SRU. + + After discussing with @paelzer (and @dannf as a

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Status from old attempts to solve same nature issues: Older (2018) merge request from @raharper: https://github.com/koverstreet/bcache-tools/pull/1 addressing the fact that kernel uevents would not always emit CACHED_UUID parameters, making udev to delete (whenever that happens) /dev/bca

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I've hidden last post as it was posted in the wrong bug. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting image

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Thanks @dannf! I spoke to Christian and him and I agreed to confine this change into ARM builds only (as SRU for Bionic). Preparing it... -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title:

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I ran the new PPA build (1:2.11+dfsg-1ubuntu7.29~ppa01) on both a ThunderX2 system and a Hi1620 system overnight, and both survived (6574 & 12919 iterations, respectively). -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Worked being done for the Bionic SRU: BUG: https://bugs.launchpad.net/qemu/+bug/1805256 (fix for the bionic regression demonstrated at LP: #1885419) PPA: https://launchpad.net/~rafaeldtinoco/+archive/ubuntu/lp1805256-bionic MERGE: https://tinyurl.com/y8sucs6x Merge proposal currently going under

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Merge proposal linked: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/387269 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rc

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Started working on this again... ** Changed in: qemu (Ubuntu Bionic) Status: Triaged => In Progress -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_r

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Re-open for bionic due to regression found ** Changed in: kunpeng920/ubuntu-18.04 Status: Fix Released => Triaged ** Changed in: kunpeng920/ubuntu-18.04-hwe Status: Fix Released => Triaged ** Changed in: kunpeng920 Status: Fix Released => Triaged -- You received this bug n

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This will re-open again for Bionic due to bug 1885419 forcing a revert of the former backports. After a deeper evaluation if the assert is wrong in the backport or just flagging a problem formerly already existing in Bionic this will be re-fixed. ** Changed in: qemu (Ubuntu Bionic) Status

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920/ubuntu-20.04 Status: Fix Committed => Fix Released ** Changed in: kunpeng920/ubuntu-19.10 Status: Fix Committed => Fix Released ** Changed in: kunpeng920/ubuntu-18.04-hwe Status: Fix Committed => Fix Released ** Changed in: kunpeng920/ubuntu-18.04

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This bug was fixed in the package qemu - 1:4.0+dfsg-0ubuntu9.7 --- qemu (1:4.0+dfsg-0ubuntu9.7) eoan; urgency=medium * d/p/ubuntu/lp-1805256*: Fixes for QEMU on aarch64 ARM hosts - async: use explicit memory barriers (LP: #1805256) - aio-wait: delegate polling of main AioCon

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This bug was fixed in the package qemu - 1:2.11+dfsg-1ubuntu7.27 --- qemu (1:2.11+dfsg-1ubuntu7.27) bionic; urgency=medium * d/p/ubuntu/lp-1805256*: Fixes for QEMU on aarch64 ARM hosts - aio: rename aio_context_in_iothread() to in_aio_context_home_thread() - aio: Do aio_noti

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This bug was fixed in the package qemu - 1:4.2-3ubuntu6.2 --- qemu (1:4.2-3ubuntu6.2) focal; urgency=medium * d/p/ubuntu/lp-1805256*: Fixes for QEMU on aarch64 ARM hosts - async: use explicit memory barriers (LP: #1805256) - aio-wait: delegate polling of main AioContext if B

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

We had the 14 (instead f 7) days in -proposed for some extended maturing. Nothing came up in regard to this and all validations were good. Dropping block-proposed to be released once the SRU Team gets to it. ** Tags removed: block-proposed-bionic block-proposed-eoan block- proposed-focal -- You

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920/ubuntu-18.04 Status: In Progress => Fix Committed ** Changed in: kunpeng920/ubuntu-18.04-hwe Status: In Progress => Fix Committed ** Changed in: kunpeng920/ubuntu-19.10 Status: In Progress => Fix Committed ** Changed in: kunpeng920/ubuntu-20.04

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I've looked and retried the tests - all green now. Let us give it a few extra days in proposed as planned, but other than that it looks ok to be released. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bug

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

100 run on bionic/eoan/focal -proposed `qemu-img convert` all successful. No hang occurs. Thanks a lot. ** Tags removed: verification-needed verification-needed-eoan verification-needed-focal ** Tags added: verification-done-bionic verification-done-eoan verification-done-focal ** Changed in: k

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Hello dann, or anyone else affected, Accepted qemu into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/qemu/1:4.2-3ubuntu6.2 in a few hours, and then in the -proposed repository. Please help us by testing this new package. See https://wiki.ubu

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Migrated right now, sponsoring the related SRU portions into B/E/F ... for consideration by the SRU Team. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_rea

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

This bug was fixed in the package qemu - 1:4.2-3ubuntu8 --- qemu (1:4.2-3ubuntu8) groovy; urgency=medium * d/p/ubuntu/lp-1805256*: Fixes for QEMU on aarch64 ARM hosts - async: use explicit memory barriers (LP: #1805256) - aio-wait: delegate polling of main AioContext if BQL

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

FYI: sponsored into groovy -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images Status in kunpeng920: In

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** No longer affects: qemu (Ubuntu Disco) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images Status in ku

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920 Status: Triaged => In Progress -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when convertin

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Ike's backport in https://launchpad.net/~ikepanhc/+archive/ubuntu/lp1805256 tests well for me on Cavium Sabre. One minor note is that the function in_aio_context_home_thread() is being called in aio-win32.c, but that function didn't exist in 2.11. We probably want to change that to aio_context_in_i

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Tested debs in ppa:rafaeldtinoco/lp1805256 for focal and eoan and 1000 qemu-img convert passed. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event l

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Merge proposal linked: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/383566 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rc

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Merge proposal linked: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/383551 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rc

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Merge proposal linked: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/383545 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rc

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

FYIO, from now on all the "merge" work will be done in the merge requests being linked to this BUG (at the top). @paelzer will be verifying those. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256

Re: [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

On Wed, May 6, 2020 at 1:20 PM Philippe Mathieu-Daudé <1805...@bugs.launchpad.net> wrote: > > Isn't this fixed by commit 5710a3e09f9? See comment #43. The discussions hence are about testing/integration of that fix. -dann -- You received this bug notification because you are a member of qemu-

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Isn't this fixed by commit 5710a3e09f9? commit 5710a3e09f9b85801e5ce70797a4a511e5fc9e2c Author: Paolo Bonzini Date: Tue Apr 7 10:07:46 2020 -0400 async: use explicit memory barriers When using C11 atomics, non-seqcst reads and writes do not participate in the total order of se

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Merge proposal linked: https://code.launchpad.net/~rafaeldtinoco/ubuntu/+source/qemu/+git/qemu/+merge/383530 -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rc

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Description changed: [Impact] * QEMU locking primitives might face a race condition in QEMU Async I/O bottom halves scheduling. This leads to a dead lock making either QEMU or one of its tools to hang indefinitely. [Test Case] * qemu-img convert -f qcow2 -O qcow2 ./disk01.q

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920/ubuntu-18.04 Status: New => Triaged ** Changed in: kunpeng920/ubuntu-18.04 Assignee: (unassigned) => Ike Panhc (ikepanhc) ** Changed in: kunpeng920/ubuntu-18.04-hwe Status: New => Triaged ** Changed in: kunpeng920/ubuntu-18.04-hwe Assignee: (unas

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Description changed: + [Impact] + + * QEMU locking primitives might face a race condition in QEMU Async I/O + bottom halves scheduling. This leads to a dead lock making either QEMU + or one of its tools to hang indefinitely. + + [Test Case] + + * qemu-img convert -f qcow2 -O qcow2 ./disk01.q

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: qemu (Ubuntu) Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned) ** Changed in: qemu Status: In Progress => Fix Released ** Changed in: qemu (Ubuntu Focal) Status: Incomplete => In Progress ** Changed in: qemu (Ubuntu Eoan) Status: Incomplete =

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

fyi, I backported that fix also to focal/groovy and eoan, and with those builds. On my test systems the hang reliable occurs within 20 iterations. After the fix, they have survived > 500 iterations thus far. I'll leave running overnight just to be sure. -- You received this bug notification becau

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Hello Ike, Please, let me know if you want me to go after the needed SRUs for this fix or if you will. I'll wait for the final feedback from tests with your PPA. Cheers! -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

The test deb has been pushed to https://launchpad.net/~ikepanhc/+archive/ubuntu/lp1805256 40 run with patch mentioned in #43 and all passed. Thanks. ** Changed in: kunpeng920 Status: Incomplete => Triaged ** Changed in: kunpeng920 Assignee: (unassigned) => Ike Panhc (ikepanhc) **

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Thanks. I will test it. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images Status in kunpeng920: Incomp

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Hi, Ike. I think this tricky bug was fixed by Paolo last month. Please try patch https://git.qemu.org/?p=qemu.git;a=commitdiff;h=5710a3e09f9b85801e5ce70797a4a511e5fc9e2c. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Take several CPUs offline and re-test. Even only 32 threads left, I still can reproduce this issue easily. ubuntu@kreiken:~$ lscpu | grep list;for i in `seq 1 10`;do echo ;rm -f out.img;timeout 30 qemu-img convert -f qcow2 -O qcow2 ./bionic-server-cloudimg-arm64.img out.img -p; done On-line CPU(

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

PPA created with temporarily workaround in comment #34. https://launchpad.net/~ikepanhc/+archive/ubuntu/lp1805256 This PPA can solve temporarily but is not acceptable for offical release. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QE

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: qemu (Ubuntu Eoan) Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned) ** Changed in: qemu Assignee: Rafael David Tinoco (rafaeldtinoco) => (unassigned) -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEM

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Tags added: ikeradar -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images Status in kunpeng920: Incomp

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

=》Could HiSilicon respond to Dann & Rafael's comments #36 and #38? =》Is there an upstream acceptable patch that addresses this issue? No upstream patchset， I Only provide a private solution and do not know this root cause. -- You received this bug notification because you are a member of qemu- d

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Could HiSilicon respond to Dann & Rafael's comments #36 and #38? Is there an upstream acceptable patch that addresses this issue? ** Changed in: kunpeng920 Status: Confirmed => Incomplete ** Changed in: qemu (Ubuntu Bionic) Status: Confirmed => Incomplete ** Changed in: qemu (Ubunt

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Tags added: patch -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images Status in kunpeng920: Confirmed

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

fyi, what I tested in Comment #35 was upstream QEMU (@ aceeaa69d2) with a port of the patch in Comment #34 applied. I've attached that patch here. While it did avoid the issue in my testing, I agree with Rafael's Comment #36 that it does not appear to address the root cause (as I understand it), an

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I tested the patch in Comment #34, and it was also failed to pass 5 iterations. Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later This is free software: you are free to change and redistribute it. There is NO WARRANTY, to

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Hello Fred, Based on Dann's feedback on testing, I'm failing to see where your patch fixes the "root" cause (despite being able to mitigate the issue by changing the aio notification mechanism). I think the root cause is best described in this 2 emails from the thread: https://lore.kernel.org/qe

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

I tested the patch in Comment #34, and it was able to pass 500 iterations. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

include/block/aio.h | 3 +++ qemu-img.c | 4 util/async.c| 5 + 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/include/block/aio.h b/include/block/aio.h index e9bc04c..9153d87 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -89,6 +89,9 @@ stru

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Changed in: kunpeng920 Status: New => Confirmed ** Changed in: qemu (Ubuntu Bionic) Status: New => Confirmed ** Changed in: qemu (Ubuntu Disco) Status: New => Confirmed ** Changed in: qemu (Ubuntu Focal) Status: New => Confirmed -- You received this bug notificat

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Also affects: kunpeng920 Importance: Undecided Status: New -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1805256 Title: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when c

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

On 02/10/19 16:58, Torvald Riegel wrote: > This example looks like Dekker synchronization (if I get the intent right). It is the same pattern. However, one of the two synchronized variables is a counter rather than just a flag. > Two possible implementations of this are either (1) with all memor

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

On Wed, 2019-10-02 at 15:20 +0200, Paolo Bonzini wrote: > On 02/10/19 13:05, Jan Glauber wrote: >> The arm64 code generated for the >> atomic_[add|sub] accesses of ctx->notify_me doesn't contain any >> memory barriers. It is just plain ldaxr/stlxr. >> >> From my understanding this is not sufficient

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Documenting this here as bug# was dropped from the mail thread: On 02/10/19 13:05, Jan Glauber wrote: > The arm64 code generated for the > atomic_[add|sub] accesses of ctx->notify_me doesn't contain any > memory barriers. It is just plain ldaxr/stlxr. > > From my understanding this is not sufficie

[Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

Debug files for aio-posix generated on 18.04 on ThunderX2. Compiler: gcc version 7.4.0 (Ubuntu/Linaro 7.4.0-1ubuntu1~18.04.1) Distro: Ubuntu 18.04.3 LTS ** Attachment added: "aio-posix.tar.xz" https://bugs.launchpad.net/qemu/+bug/1805256/+attachment/5293619/+files/aio-posix.tar.xz -- You r

[Qemu-devel] [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Also affects: qemu (Ubuntu Ff-series) Importance: Undecided Status: New ** Also affects: qemu (Ubuntu Bionic) Importance: Undecided Status: New ** Also affects: qemu (Ubuntu Eoan) Importance: Medium Assignee: Rafael David Tinoco (rafaeldtinoco) Status: In Pro

[Qemu-devel] [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Description changed: + Command: + + qemu-img convert -m 1 -f qcow2 -O qcow2 ./disk01.qcow2 ./output.qcow2 + + Hangs indefinitely approximately 30% of the runs. + + + + Workaround: + + qemu-img convert -m 1 -f qcow2 -O qcow2 ./disk01.qcow2 ./output.qcow2 + + Run "qemu-img convert" wit

[Qemu-devel] [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

In comment #14, please disregard the second half of the issue, related to: 0xaabd4100 <+16>: cbz w1, 0xaabd4108 0xaabd4104 <+20>: ret 0xaabd4108 <+24>: ldaxr w1, [x0] 0xaabd410c <+28>: orr w1, w1, #0x1 => 0xaabd4110 <+32>

[Qemu-devel] [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

QEMU BUG: #1 Alright, one of the issues is (according to comment #14): """ Meaning that code is waiting for a futex inside kernel. (gdb) print rcu_call_ready_event $4 = {value = 4294967295, initialized = true} The QemuEvent "rcu_call_ready_event->value" is set to INT_MAX and I don't know why ye

[Qemu-devel] [Bug 1805256] Re: qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images

** Summary changed: - qemu-img hangs on high core count ARM system + qemu-img hangs on rcu_call_ready_event logic in Aarch64 when converting images ** Changed in: qemu Status: Confirmed => In Progress ** Changed in: qemu Assignee: (unassigned) => Rafael David Tinoco (rafaeldtinoco)