Re: Workaround for QSBR mode issue #4390

Robert Kirkman via bind-users <[email protected]>
Newsgroups gmane.network.dns.bind9.user
Message-ID <1b70d206f43ea1d1e3e7eac3ba4fbd399044ca54__19335.7817757473$1787730132$gmane$org@termux.dev>
August 26, 2026 at 2:25 AM, "Petr Špaček" <[email protected] mailto:[email protected]?to=%22Petr%20%C5%A0pa%C4%8Dek%22%20%3Cpspacek%40isc.org%3E > wrote:


> 
> On 26. 08. 26 3:00, Robert Kirkman via bind-users wrote:
> 
> > 
> > Hello, we have developed this workaround for the hanging problem with builds of bind with the configure argument --with-liburcu=qsbr :
> >  the hanging problem is reproducible on both ARM Android and ARM GNU/Linux, and is fixed on both by this.
> > 
> Out of curiosity, why do you want QSBR?
> 
> -- Petr Špaček
> 
Thanks for asking. In 2025, we received a report that the dig command had the "Bad system call" error immediately on the device Huawei LLD-L21 with Android 9until the QSBR mode was enabled, which worked around the problem.

https://github.com/termux/termux-packages/issues/23820

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