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Date: Mon, 15 Apr 2019 11:52:47 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Marcin Cieslak <saper@saper.info>
Cc: freebsd-stable@freebsd.org
Subject: Re: After 12.x upgrade: mysqld   RET   _umtx_op -1 errno 45
 Operation not supported
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On Mon, Apr 15, 2019 at 08:28:39AM +0000, Marcin Cieslak wrote:
> On Mon, 15 Apr 2019, Konstantin Belousov wrote:
> 
> > On Mon, Apr 15, 2019 at 08:01:27AM +0000, Marcin Cieslak wrote:
> > > 
> > >  50766 mysqld   CALL  _umtx_op(0x966eaa0,UMTX_OP_RESERVED0,0x18cab,0,0)
> > >  50766 mysqld   RET   _umtx_op -1 errno 45 Operation not supported
> 
> > I believe these ops were removed at r263318.
> 
> That was quick, thank you!
> Is there any way this could be fixed on the library level?
You probably can write a LD_PRELOAD'ed library which would intercept
_umtx_op and emulate the call.