From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:52833)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <pbonzini@redhat.com>) id 1ZUz2A-0006mU-6U
	for qemu-devel@nongnu.org; Thu, 27 Aug 2015 11:24:10 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <pbonzini@redhat.com>) id 1ZUz25-0005b2-Ai
	for qemu-devel@nongnu.org; Thu, 27 Aug 2015 11:24:10 -0400
Date: Thu, 27 Aug 2015 11:23:57 -0400 (EDT)
From: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <1648114497.20345814.1440689037970.JavaMail.zimbra@redhat.com>
In-Reply-To: <55DED7D1.3020101@kamp.de>
References: <55DED7D1.3020101@kamp.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] coroutine pool memory usage
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Peter Lieven <pl@kamp.de>
Cc: Kevin Wolf <kwolf@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, qemu-devel@nongnu.org, qemu block <qemu-block@nongnu.org>

> i was debugging increased memory footprint of qemu over the past time and
> found that the coroutine pool heap usage can grow up to 70MB by just booting
> an Ubuntu Live CD. And those 70MB are never freed.
>
> Is this expected? Wouldn't it make sense to asynchronically throw some
> coroutines (or at least their stack) away if there is no I/O?

Yes, perhaps that can be added.  But is it RSS that increases, or is it just
wasted address space?

Paolo