From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: kvm memory leak (Was Re: vhost-net patches) Date: Wed, 28 Oct 2009 18:46:18 +0200 Message-ID: <20091028164618.GA29235@redhat.com> References: <20091023110438.GA20229@redhat.com> <1256310168.4443.2.camel@localhost.localdomain> <1256310765.4443.4.camel@localhost.localdomain> <1256315020.4443.12.camel@localhost.localdomain> <20091026200513.GA26623@redhat.com> <1256592889.10142.8.camel@localhost.localdomain> <20091027064302.GB26914@redhat.com> <1256654819.4753.6.camel@localhost.localdomain> <20091027152753.GA4622@redhat.com> <1256661378.6745.2.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Sridhar Samudrala , Shirley Ma , David Stevens , kvm@vger.kernel.org, sri@linux.vnet.ibm.com, mashirle@linux.vnet.ibm.com, avi@redhat.com To: Shirley Ma Return-path: Received: from mx1.redhat.com ([209.132.183.28]:3216 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754592AbZJ1Qsj (ORCPT ); Wed, 28 Oct 2009 12:48:39 -0400 Content-Disposition: inline In-Reply-To: <1256661378.6745.2.camel@localhost.localdomain> Sender: kvm-owner@vger.kernel.org List-ID: On Tue, Oct 27, 2009 at 09:36:18AM -0700, Shirley Ma wrote: > Hello Michael, > > On Tue, 2009-10-27 at 17:27 +0200, Michael S. Tsirkin wrote: > > Possibly GFP_ATOMIC allocations in vring_add_indirect are failing? > > Is there a chance you are tight on guest memory for some reason? > > with vhost, virtio does currently consume a bit more memory than > > with userspace backend. > > I did see memory leak on host every time after exiting guest. I don't > know where. Do you see it? I don't see a leak specific to vhost. However, even without vhost, starting up guest increases kmalloc-128 counter in /proc/slabinfo and this fails to go down when qemu is killed. Anyone else seeing this? -- MST