From: Paolo Bonzini <pbonzini@redhat.com>
To: "Alex Bennée" <alex.bennee@linaro.org>, qemu-devel@nongnu.org
Cc: Riku Voipio <riku.voipio@iki.fi>, Laurent Vivier <laurent@vivier.eu>
Subject: Re: [PATCH] linux-user: un-register threads from RCU before exit
Date: Tue, 11 Feb 2020 19:04:29 +0100 [thread overview]
Message-ID: <d2429139-b27e-2c05-8b8c-ac57fae98c4d@redhat.com> (raw)
In-Reply-To: <20200211173510.16347-1-alex.bennee@linaro.org>
On 11/02/20 18:35, Alex Bennée wrote:
> Through a mechanism I don't quite yet understand we can find ourselves
> with a left over RCU thread when we exit group. This is a racy failure
> that occurs for example with:
>
> alpha-linux-user running testthread
> with libhowvec.so plugin
> but only when run from make
>
> This may not be the correct fix but it seems to alleviate the
> symptoms.
Can you explain what is the effect of this left-over thread? All
threads should be terminated when the process exits and I'm not sure why
the user-mode emulation is special.
Paolo
prev parent reply other threads:[~2020-02-11 18:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-11 17:35 [PATCH] linux-user: un-register threads from RCU before exit Alex Bennée
2020-02-11 17:43 ` Peter Maydell
2020-02-11 21:58 ` Alex Bennée
2020-02-11 18:04 ` Paolo Bonzini [this message]
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