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Date: Wed, 21 Oct 2015 17:40:21 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com, cygwin-developers AT cygwin DOT com
Subject: Re: Jemalloc under CYGWIN
Message-ID: <20151021154021.GA19868@calimero.vinschen.de>
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On Oct 21 22:43, Yucong Sun wrote:
> On Wed, Oct 21, 2015 at 10:15 PM, Corinna Vinschen
> <corinna-cygwin AT cygwin DOT com> wrote:
> > On Oct 21 21:49, Yucong Sun wrote:
> >> > What exactly is the malloc problem you're seeing?
> >>
> >> The specific problem I'm having is that jemalloc's malloc_init() calls
> >> needs to use pthread_mutex_init()  or even pthread_mutex with a
> >> initializer.   Both in-turn uses malloc, triggering this issue.
> >>
> >> A quick fix would be somehow make pthread always use system
> >> malloc/free, which shouldn't be that bad.
> >
> > What about using a native critical section instead?  It shouldn't be too
> > tricky to conditionalize this in jemalloc.
>=20
> Possibly, jemalloc already have support of this.  However I wasn't so
> sure that this was possible before,
>=20
> see https://github.com/jemalloc/jemalloc/blob/dev/include/jemalloc/intern=
al/mutex.h#L80

Yes, that looks good.  Please use critical sections for the time being.
We're going to drop XP support end of this year, but up to that point we
can't use SRW locks.


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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