From: Paolo Bonzini <pbonzini@redhat.com>
To: Ying Fang <fangying1@huawei.com>, qemu-devel@nongnu.org
Cc: stefanha@redhat.com
Subject: Re: [RFC PATCH 0/4] async: fix hangs on weakly-ordered architectures
Date: Wed, 8 Apr 2020 17:05:21 +0200 [thread overview]
Message-ID: <13f3affe-0c08-476d-e85c-2a3826b5dc1c@redhat.com> (raw)
In-Reply-To: <047d4327-8a79-ffc1-94fe-47355ed955c5@huawei.com>
On 08/04/20 11:12, Ying Fang wrote:
> On 2020/4/7 22:07, Paolo Bonzini wrote:
>> ARM machines and other weakly-ordered architectures have been suffering
>> for a long time from hangs in qemu-img and qemu-io. For QEMU binaries
>> these are mitigated by the timers that sooner or later fire in the main
>> loop, but these will not happen for the tools and probably not with I/O
>> threads either.
>
> yes, we occasionally see qemu main thread hangs and VM stuck in in-shutdown
> state on aarch64 platform. So this could happen with I/O threads.
Thanks for confirming! Have you managed to test the final version of
the patches? It would be great to include test results.
Paolo
next prev parent reply other threads:[~2020-04-08 15:06 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-07 14:07 [RFC PATCH 0/4] async: fix hangs on weakly-ordered architectures Paolo Bonzini
2020-04-07 14:07 ` [PATCH 1/5] atomics: convert to reStructuredText Paolo Bonzini
2020-04-07 16:49 ` Alex Bennée
2020-04-07 14:07 ` [PATCH 2/5] atomics: update documentation Paolo Bonzini
2020-04-07 15:25 ` Richard Henderson
2020-04-07 15:52 ` Paolo Bonzini
2020-04-07 14:07 ` [PATCH 3/5] rcu: do not mention atomic_mb_read/set in documentation Paolo Bonzini
2020-04-07 17:19 ` Richard Henderson
2020-04-07 14:07 ` [PATCH 4/5] aio-wait: delegate polling of main AioContext if BQL not held Paolo Bonzini
2020-04-07 14:07 ` [PATCH 5/5] async: use explicit memory barriers Paolo Bonzini
2020-04-09 6:22 ` Ying Fang
2020-04-08 9:12 ` [RFC PATCH 0/4] async: fix hangs on weakly-ordered architectures Ying Fang
2020-04-08 15:05 ` Paolo Bonzini [this message]
2020-04-09 6:54 ` Ying Fang
2020-04-09 15:17 ` Stefan Hajnoczi
-- strict thread matches above, loose matches on Subject: below --
2020-04-06 19:13 Paolo Bonzini
2020-04-07 9:10 ` Stefan Hajnoczi
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