From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39817) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bO075-0007GT-1f for qemu-devel@nongnu.org; Fri, 15 Jul 2016 06:12:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bO070-0001eR-R1 for qemu-devel@nongnu.org; Fri, 15 Jul 2016 06:12:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52705) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bO070-0001eN-LB for qemu-devel@nongnu.org; Fri, 15 Jul 2016 06:12:50 -0400 Message-ID: <1468577568.22036.8.camel@redhat.com> From: Gerd Hoffmann Date: Fri, 15 Jul 2016 12:12:48 +0200 In-Reply-To: References: <57888385.1080403@suse.com> <57889319.3030609@kamp.de> <5788A308.5010909@suse.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 Subject: Re: [Qemu-devel] Regression with commit 095497ffc66b7f031 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: Juergen Gross , Peter Lieven , xen-devel , "qemu-devel@nongnu.org" On Fr, 2016-07-15 at 12:02 +0200, Paolo Bonzini wrote: >=20 > On 15/07/2016 10:47, Juergen Gross wrote: > > Nothing scaring and no real difference between working and not working > > variant. > >=20 > > Meanwhile I've been digging a little bit deeper and found the reason: > > libxenstore is setting up a reader thread which is waiting for the > > watch to fire. With above commit the stack size of that thread (16kB) > > is too small. Setting it to 32kB made qemu work again. >=20 > This makes very little sense (not your fault)... The commit doesn't > change stack usage at all, TLS should not be on the stack. >=20 > Can you capture a backtrace where the 16K stack is exceeded? Perhaps > it's only due to inlining decision on the compiler, in which case > Peter's patch from today is only a bandaid. Hmm, I guess I hold off the vnc pull request for now ... cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: Regression with commit 095497ffc66b7f031 Date: Fri, 15 Jul 2016 12:12:48 +0200 Message-ID: <1468577568.22036.8.camel@redhat.com> References: <57888385.1080403@suse.com> <57889319.3030609@kamp.de> <5788A308.5010909@suse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bO073-0008F3-B2 for xen-devel@lists.xenproject.org; Fri, 15 Jul 2016 10:12:53 +0000 In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Paolo Bonzini Cc: Juergen Gross , xen-devel , Peter Lieven , "qemu-devel@nongnu.org" List-Id: xen-devel@lists.xenproject.org T24gRnIsIDIwMTYtMDctMTUgYXQgMTI6MDIgKzAyMDAsIFBhb2xvIEJvbnppbmkgd3JvdGU6Cj4g Cj4gT24gMTUvMDcvMjAxNiAxMDo0NywgSnVlcmdlbiBHcm9zcyB3cm90ZToKPiA+IE5vdGhpbmcg c2NhcmluZyBhbmQgbm8gcmVhbCBkaWZmZXJlbmNlIGJldHdlZW4gd29ya2luZyBhbmQgbm90IHdv cmtpbmcKPiA+IHZhcmlhbnQuCj4gPiAKPiA+IE1lYW53aGlsZSBJJ3ZlIGJlZW4gZGlnZ2luZyBh IGxpdHRsZSBiaXQgZGVlcGVyIGFuZCBmb3VuZCB0aGUgcmVhc29uOgo+ID4gbGlieGVuc3RvcmUg aXMgc2V0dGluZyB1cCBhIHJlYWRlciB0aHJlYWQgd2hpY2ggaXMgd2FpdGluZyBmb3IgdGhlCj4g PiB3YXRjaCB0byBmaXJlLiBXaXRoIGFib3ZlIGNvbW1pdCB0aGUgc3RhY2sgc2l6ZSBvZiB0aGF0 IHRocmVhZCAoMTZrQikKPiA+IGlzIHRvbyBzbWFsbC4gU2V0dGluZyBpdCB0byAzMmtCIG1hZGUg cWVtdSB3b3JrIGFnYWluLgo+IAo+IFRoaXMgbWFrZXMgdmVyeSBsaXR0bGUgc2Vuc2UgKG5vdCB5 b3VyIGZhdWx0KS4uLiAgVGhlIGNvbW1pdCBkb2Vzbid0Cj4gY2hhbmdlIHN0YWNrIHVzYWdlIGF0 IGFsbCwgVExTIHNob3VsZCBub3QgYmUgb24gdGhlIHN0YWNrLgo+IAo+IENhbiB5b3UgY2FwdHVy ZSBhIGJhY2t0cmFjZSB3aGVyZSB0aGUgMTZLIHN0YWNrIGlzIGV4Y2VlZGVkPyAgUGVyaGFwcwo+ IGl0J3Mgb25seSBkdWUgdG8gaW5saW5pbmcgZGVjaXNpb24gb24gdGhlIGNvbXBpbGVyLCBpbiB3 aGljaCBjYXNlCj4gUGV0ZXIncyBwYXRjaCBmcm9tIHRvZGF5IGlzIG9ubHkgYSBiYW5kYWlkLgoK SG1tLCBJIGd1ZXNzIEkgaG9sZCBvZmYgdGhlIHZuYyBwdWxsIHJlcXVlc3QgZm9yIG5vdyAuLi4K CmNoZWVycywKICBHZXJkCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVuLm9yZwpo dHRwczovL2xpc3RzLnhlbi5vcmcveGVuLWRldmVsCg==