From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id CB9DA6B007E for ; Mon, 18 Apr 2016 05:50:07 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id e190so319228222pfe.3 for ; Mon, 18 Apr 2016 02:50:07 -0700 (PDT) Received: from mga03.intel.com (mga03.intel.com. [134.134.136.65]) by mx.google.com with ESMTP id hs5si4574970pac.157.2016.04.18.02.50.06 for ; Mon, 18 Apr 2016 02:50:07 -0700 (PDT) From: "Li, Liang Z" Subject: RE: post-copy is broken? Date: Mon, 18 Apr 2016 09:50:03 +0000 Message-ID: References: <20160413080545.GA2270@work-vm> <20160413114103.GB2270@work-vm> <20160413125053.GC2270@work-vm> <20160413205132.GG26364@redhat.com> <20160414123441.GF2252@work-vm> <20160414162230.GC9976@redhat.com> <20160415125236.GA3376@node.shutemov.name> <20160415134233.GG2229@work-vm> <20160415152330.GB3376@node.shutemov.name> <20160415163448.GJ2229@work-vm> In-Reply-To: <20160415163448.GJ2229@work-vm> Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: "Dr. David Alan Gilbert" , "Kirill A. Shutemov" Cc: Andrea Arcangeli , "kirill.shutemov@linux.intel.com" , Amit Shah , "qemu-devel@nongnu.org" , "quintela@redhat.com" , "linux-mm@kvack.org" > > > > I've run it directly, setting relevant QTEST_QEMU_BINARY. > > > > > > Interesting; it's failing reliably for me - but only with a > > > reasonably freshly booted machine (so that the pages get THPd). > > > > The same here. Freshly booted machine with 64GiB ram. I've checked > > /proc/vmstat: huge pages were allocated >=20 > Thanks for testing. >=20 > Damn; this is confusing now. I've got a RHEL7 box with 4.6.0-rc3 on wher= e it > works, and a fedora24 VM where it fails (the f24 VM is where I did the bi= sect > so it works fine with the older kernel on the f24 userspace in that VM). >=20 > So lets see: > works: Kirill's (64GB machine) > Dave's RHEL7 host (24GB RAM, dual xeon, RHEL7 userspace and ker= nel > config) > fails: Dave's f24 VM (4GB RAM, 4 vcpus VM on my laptop24 userspace and > kernel config) >=20 > So it's any of userspace, kernel config, machine hardware or hmm. >=20 > My f24 box has transparent_hugepage_madvise, where my rhel7 has > transparent_hugepage_always (but still works if I flip it to madvise at r= un > time). I'll try and get the configs closer together. >=20 > Liang Li: Can you run my test on your setup which fails the migrate and t= ell > me what your userspace is? >=20 > (If you've not built my test yet, you might find you need to add a : > tests/postcopy-test$(EXESUF): tests/postcopy-test.o >=20 > to the tests/Makefile) >=20 Hi Dave, How to build and run you test? I didn't do that before. Thanks! Liang >=20 > Dave > > > > -- > > Kirill A. Shutemov > -- > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org